31552225513 has 4 divisors (see below), whose sum is σ = 32023154320. Its totient is φ = 31081296708.

The previous prime is 31552225511. The next prime is 31552225517.

31552225513 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31552225513 - 2¹ = 31552225511 is a prime.

It is a super-2 number, since 2×31552225513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31552225511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235464303 + ... + 235464436.

It is an arithmetic number, because the mean of its divisors is an integer number (8005788580).

Almost surely, 2^31552225513 is an apocalyptic number.

It is an amenable number.

31552225513 is a deficient number, since it is larger than the sum of its proper divisors (470928807).

31552225513 is an equidigital number, since it uses as much as digits as its factorization.

31552225513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470928806.

The product of its digits is 45000, while the sum is 34.

The spelling of 31552225513 in words is "thirty-one billion, five hundred fifty-two million, two hundred twenty-five thousand, five hundred thirteen".