31120433401 has 4 divisors (see below), whose sum is σ = 31879468404. Its totient is φ = 30361398400.

The previous prime is 31120433363. The next prime is 31120433437. The reversal of 31120433401 is 10433402113.

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 809971600 + 30310461801 = 28460^2 + 174099^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120433401 - 2²⁵ = 31086878969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120433101) 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, 379517440 + ... + 379517521.

It is an arithmetic number, because the mean of its divisors is an integer number (7969867101).

Almost surely, 2^31120433401 is an apocalyptic number.

It is an amenable number.

31120433401 is a deficient number, since it is larger than the sum of its proper divisors (759035003).

31120433401 is an equidigital number, since it uses as much as digits as its factorization.

31120433401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759035002.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31120433401 its reverse (10433402113), we get a palindrome (41553835514).

The spelling of 31120433401 in words is "thirty-one billion, one hundred twenty million, four hundred thirty-three thousand, four hundred one".