131305602 has 16 divisors (see below), whose sum is σ = 265319712. Its totient is φ = 43317120.

The previous prime is 131305589. The next prime is 131305607. The reversal of 131305602 is 206503131.

It is a super-2 number, since 2×131305602² = 34482322233164808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131305607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112224 + ... + 113387.

It is an arithmetic number, because the mean of its divisors is an integer number (16582482).

Almost surely, 2^131305602 is an apocalyptic number.

131305602 is an abundant number, since it is smaller than the sum of its proper divisors (134014110).

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

131305602 is a wasteful number, since it uses less digits than its factorization.

131305602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225713.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131305602 is about 11458.8656506654. The cubic root of 131305602 is about 508.2699316668.

Adding to 131305602 its reverse (206503131), we get a palindrome (337808733).

The spelling of 131305602 in words is "one hundred thirty-one million, three hundred five thousand, six hundred two".