31139222401 has 4 divisors (see below), whose sum is σ = 35587682752. Its totient is φ = 26690762052.

The previous prime is 31139222377. The next prime is 31139222407. The reversal of 31139222401 is 10422293113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31139222401 - 2⁹ = 31139221889 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 31139222401.

It is not an unprimeable number, because it can be changed into a prime (31139222407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224230165 + ... + 2224230178.

It is an arithmetic number, because the mean of its divisors is an integer number (8896920688).

Almost surely, 2^31139222401 is an apocalyptic number.

It is an amenable number.

31139222401 is a deficient number, since it is larger than the sum of its proper divisors (4448460351).

31139222401 is an equidigital number, since it uses as much as digits as its factorization.

31139222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448460350.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 31139222401 in words is "thirty-one billion, one hundred thirty-nine million, two hundred twenty-two thousand, four hundred one".