31040010013525 has 6 divisors (see below), whose sum is σ = 38489612416802. Its totient is φ = 24832008010800.

The previous prime is 31040010013513. The next prime is 31040010013547. The reversal of 31040010013525 is 52531001004013.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6329159071524 + 24710850942001 = 2515782^2 + 4971001^2 .

It is not a de Polignac number, because 31040010013525 - 2³⁹ = 30490254199637 is a prime.

It is a super-4 number, since 4×31040010013525⁴ (a number of 55 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1241600400541 = 31040010013525 / (3 + 1 + 0 + 4 + 0 + 0 + 1 + 0 + 0 + 1 + 3 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31040010013525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 620800200246 + ... + 620800200295.

Almost surely, 2^{31040010013525} is an apocalyptic number.

It is an amenable number.

31040010013525 is a deficient number, since it is larger than the sum of its proper divisors (7449602403277).

31040010013525 is a wasteful number, since it uses less digits than its factorization.

31040010013525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241600400551 (or 1241600400546 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 31040010013525 its reverse (52531001004013), we get a palindrome (83571011017538).

The spelling of 31040010013525 in words is "thirty-one trillion, forty billion, ten million, thirteen thousand, five hundred twenty-five".