31081249114451 has 16 divisors (see below), whose sum is σ = 31626355858944. Its totient is φ = 30540637268064.

The previous prime is 31081249114439. The next prime is 31081249114453. The reversal of 31081249114451 is 15441194218013.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31081249114451 is a prime.

It is a super-2 number, since 2×31081249114451² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31081249114453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10480445 + ... + 13114961.

It is an arithmetic number, because the mean of its divisors is an integer number (1976647241184).

Almost surely, 2^{31081249114451} is an apocalyptic number.

31081249114451 is a deficient number, since it is larger than the sum of its proper divisors (545106744493).

31081249114451 is a wasteful number, since it uses less digits than its factorization.

31081249114451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635370.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 31081249114451 in words is "thirty-one trillion, eighty-one billion, two hundred forty-nine million, one hundred fourteen thousand, four hundred fifty-one".