31022400401 has 4 divisors (see below), whose sum is σ = 31530964404. Its totient is φ = 30513836400.

The previous prime is 31022400389. The next prime is 31022400481. The reversal of 31022400401 is 10400422013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10400422013 = 103 ⋅100974971.

It can be written as a sum of positive squares in 2 ways, for example, as 8836000000 + 22186400401 = 94000^2 + 148951^2 .

It is a cyclic number.

It is not a de Polignac number, because 31022400401 - 2³⁴ = 13842531217 is a prime.

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 31022400401.

It is not an unprimeable number, because it can be changed into a prime (31022400481) 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, 254281910 + ... + 254282031.

It is an arithmetic number, because the mean of its divisors is an integer number (7882741101).

Almost surely, 2^31022400401 is an apocalyptic number.

It is an amenable number.

31022400401 is a deficient number, since it is larger than the sum of its proper divisors (508564003).

31022400401 is an equidigital number, since it uses as much as digits as its factorization.

31022400401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508564002.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 31022400401 its reverse (10400422013), we get a palindrome (41422822414).

The spelling of 31022400401 in words is "thirty-one billion, twenty-two million, four hundred thousand, four hundred one".