131220310 has 16 divisors (see below), whose sum is σ = 254365776. Its totient is φ = 48450528.

The previous prime is 131220293. The next prime is 131220329. The reversal of 131220310 is 13022131.

It is a super-2 number, since 2×131220310² = 34437539512992200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504564 + ... + 504823.

It is an arithmetic number, because the mean of its divisors is an integer number (15897861).

Almost surely, 2^131220310 is an apocalyptic number.

131220310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131220310 is a deficient number, since it is larger than the sum of its proper divisors (123145466).

131220310 is a wasteful number, since it uses less digits than its factorization.

131220310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009407.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131220310 is about 11455.1433862698. The cubic root of 131220310 is about 508.1598557617.

Adding to 131220310 its reverse (13022131), we get a palindrome (144242441).

The spelling of 131220310 in words is "one hundred thirty-one million, two hundred twenty thousand, three hundred ten".