31323044137 has 8 divisors (see below), whose sum is σ = 39052107072. Its totient is φ = 24407566800.

The previous prime is 31323044131. The next prime is 31323044143. The reversal of 31323044137 is 73144032313.

It is an interprime number because it is at equal distance from previous prime (31323044131) and next prime (31323044143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31323044137 is a prime.

It is a super-2 number, since 2×31323044137² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323044099 and 31323044108.

It is not an unprimeable number, because it can be changed into a prime (31323044131) 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, 203396314 + ... + 203396467.

It is an arithmetic number, because the mean of its divisors is an integer number (4881513384).

Almost surely, 2^31323044137 is an apocalyptic number.

It is an amenable number.

31323044137 is a deficient number, since it is larger than the sum of its proper divisors (7729062935).

31323044137 is a wasteful number, since it uses less digits than its factorization.

31323044137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406792799.

The product of its (nonzero) digits is 18144, while the sum is 31.

It can be divided in two parts, 3132304 and 4137, that added together give a square (3136441 = 1771²).

The spelling of 31323044137 in words is "thirty-one billion, three hundred twenty-three million, forty-four thousand, one hundred thirty-seven".