131631420 has 48 divisors (see below), whose sum is σ = 371403648. Its totient is φ = 34831680.

The previous prime is 131631413. The next prime is 131631427. The reversal of 131631420 is 24136131.

It is an interprime number because it is at equal distance from previous prime (131631413) and next prime (131631427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131631427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514 + ... + 16233.

It is an arithmetic number, because the mean of its divisors is an integer number (7737576).

Almost surely, 2^131631420 is an apocalyptic number.

131631420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131631420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185701824).

131631420 is an abundant number, since it is smaller than the sum of its proper divisors (239772228).

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

131631420 is a wasteful number, since it uses less digits than its factorization.

131631420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890 (or 16888 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 131631420 is about 11473.0736945249. The cubic root of 131631420 is about 508.6899866225.

Adding to 131631420 its reverse (24136131), we get a palindrome (155767551).

The spelling of 131631420 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred twenty".