31000247013 has 16 divisors (see below), whose sum is σ = 42224742720. Its totient is φ = 20223350784.

The previous prime is 31000246943. The next prime is 31000247029. The reversal of 31000247013 is 31074200013.

It is not a de Polignac number, because 31000247013 - 2¹⁶ = 31000181477 is a prime.

It is a super-2 number, since 2×31000247013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000247093) 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, 196956 + ... + 317477.

It is an arithmetic number, because the mean of its divisors is an integer number (2639046420).

Almost surely, 2^31000247013 is an apocalyptic number.

It is an amenable number.

31000247013 is a deficient number, since it is larger than the sum of its proper divisors (11224495707).

31000247013 is a wasteful number, since it uses less digits than its factorization.

31000247013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514868.

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 31000247013 its reverse (31074200013), we get a palindrome (62074447026).

The spelling of 31000247013 in words is "thirty-one billion, two hundred forty-seven thousand, thirteen".