131021310 has 64 divisors (see below), whose sum is σ = 363750912. Its totient is φ = 29582976.

The previous prime is 131021309. The next prime is 131021311. The reversal of 131021310 is 13120131.

It is an interprime number because it is at equal distance from previous prime (131021309) and next prime (131021311).

It is a super-2 number, since 2×131021310² = 34333167348232200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13672 + ... + 21188.

It is an arithmetic number, because the mean of its divisors is an integer number (5683608).

Almost surely, 2^131021310 is an apocalyptic number.

131021310 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 131021310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181875456).

131021310 is an abundant number, since it is smaller than the sum of its proper divisors (232729602).

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

131021310 is a wasteful number, since it uses less digits than its factorization.

131021310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131021310 is about 11446.4540360760. The cubic root of 131021310 is about 507.9028453095.

Adding to 131021310 its reverse (13120131), we get a palindrome (144141441).

The spelling of 131021310 in words is "one hundred thirty-one million, twenty-one thousand, three hundred ten".