31124320401 has 16 divisors (see below), whose sum is σ = 42391332864. Its totient is φ = 20303620944.

The previous prime is 31124320391. The next prime is 31124320439. The reversal of 31124320401 is 10402342113.

It is not a de Polignac number, because 31124320401 - 2¹⁸ = 31124058257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31124320471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698476 + ... + 741698.

It is an arithmetic number, because the mean of its divisors is an integer number (2649458304).

Almost surely, 2^31124320401 is an apocalyptic number.

It is an amenable number.

31124320401 is a deficient number, since it is larger than the sum of its proper divisors (11267012463).

31124320401 is a wasteful number, since it uses less digits than its factorization.

31124320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48380.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31124320401 its reverse (10402342113), we get a palindrome (41526662514).

The spelling of 31124320401 in words is "thirty-one billion, one hundred twenty-four million, three hundred twenty thousand, four hundred one".