31540225051 has 4 divisors (see below), whose sum is σ = 31568666400. Its totient is φ = 31511783704.

The previous prime is 31540225049. The next prime is 31540225061. The reversal of 31540225051 is 15052204513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31540225051 - 2¹ = 31540225049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31540225061) 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, 14219011 + ... + 14221228.

It is an arithmetic number, because the mean of its divisors is an integer number (7892166600).

Almost surely, 2^31540225051 is an apocalyptic number.

31540225051 is a deficient number, since it is larger than the sum of its proper divisors (28441349).

31540225051 is a wasteful number, since it uses less digits than its factorization.

31540225051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28441348.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 31540225051 its reverse (15052204513), we get a palindrome (46592429564).

The spelling of 31540225051 in words is "thirty-one billion, five hundred forty million, two hundred twenty-five thousand, fifty-one".