31303012131 has 12 divisors (see below), whose sum is σ = 45219468840. Its totient is φ = 20866825440.

The previous prime is 31303012123. The next prime is 31303012133. The reversal of 31303012131 is 13121030313.

It is a happy number.

31303012131 is a `hidden beast` number, since 313 + 0 + 301 + 21 + 31 = 666.

It is not a de Polignac number, because 31303012131 - 2³ = 31303012123 is a prime.

It is a super-2 number, since 2×31303012131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31303012133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42666 + ... + 253823.

It is an arithmetic number, because the mean of its divisors is an integer number (3768289070).

Almost surely, 2^31303012131 is an apocalyptic number.

31303012131 is a deficient number, since it is larger than the sum of its proper divisors (13916456709).

31303012131 is a wasteful number, since it uses less digits than its factorization.

31303012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308226 (or 308223 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31303012131 its reverse (13121030313), we get a palindrome (44424042444).

The spelling of 31303012131 in words is "thirty-one billion, three hundred three million, twelve thousand, one hundred thirty-one".