31423557401 has 4 divisors (see below), whose sum is σ = 33272001972. Its totient is φ = 29575112832.

The previous prime is 31423557397. The next prime is 31423557409. The reversal of 31423557401 is 10475532413.

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 14859610000 + 16563947401 = 121900^2 + 128701^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423557401 - 2² = 31423557397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423557409) 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, 924222260 + ... + 924222293.

It is an arithmetic number, because the mean of its divisors is an integer number (8318000493).

Almost surely, 2^31423557401 is an apocalyptic number.

It is an amenable number.

31423557401 is a deficient number, since it is larger than the sum of its proper divisors (1848444571).

31423557401 is a wasteful number, since it uses less digits than its factorization.

31423557401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848444570.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 31423557401 in words is "thirty-one billion, four hundred twenty-three million, five hundred fifty-seven thousand, four hundred one".