131210550 has 96 divisors (see below), whose sum is σ = 366226560. Its totient is φ = 34538400.

The previous prime is 131210543. The next prime is 131210557. The reversal of 131210550 is 55012131.

It is an interprime number because it is at equal distance from previous prime (131210543) and next prime (131210557).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131210557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111465 + ... + 112635.

It is an arithmetic number, because the mean of its divisors is an integer number (3814860).

Almost surely, 2^131210550 is an apocalyptic number.

131210550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131210550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183113280).

131210550 is an abundant number, since it is smaller than the sum of its proper divisors (235016010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131210550 is a wasteful number, since it uses less digits than its factorization.

131210550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 131210550 is about 11454.7173688398. The cubic root of 131210550 is about 508.1472566877.

Adding to 131210550 its reverse (55012131), we get a palindrome (186222681).

It can be divided in two parts, 131 and 210550, that added together give a square (210681 = 459²).

The spelling of 131210550 in words is "one hundred thirty-one million, two hundred ten thousand, five hundred fifty".