31542623201 has 4 divisors (see below), whose sum is σ = 31543271172. Its totient is φ = 31541975232.

The previous prime is 31542623183. The next prime is 31542623213. The reversal of 31542623201 is 10232624513.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28832379601 + 2710243600 = 169801^2 + 52060^2 .

It is a cyclic number.

It is not a de Polignac number, because 31542623201 - 2¹⁴ = 31542606817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31542623291) 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, 244460 + ... + 350493.

It is an arithmetic number, because the mean of its divisors is an integer number (7885817793).

Almost surely, 2^31542623201 is an apocalyptic number.

It is an amenable number.

31542623201 is a deficient number, since it is larger than the sum of its proper divisors (647971).

31542623201 is an equidigital number, since it uses as much as digits as its factorization.

31542623201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647970.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 31542623201 in words is "thirty-one billion, five hundred forty-two million, six hundred twenty-three thousand, two hundred one".