31422377 has 12 divisors (see below), whose sum is σ = 36661716. Its totient is φ = 26853120.

The previous prime is 31422373. The next prime is 31422401. The reversal of 31422377 is 77322413.

It can be written as a sum of positive squares in 2 ways, for example, as 7958041 + 23464336 = 2821^2 + 4844^2 .

It is not a de Polignac number, because 31422377 - 2² = 31422373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31422373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20477 + ... + 21957.

It is an arithmetic number, because the mean of its divisors is an integer number (3055143).

Almost surely, 2^31422377 is an apocalyptic number.

It is an amenable number.

31422377 is a deficient number, since it is larger than the sum of its proper divisors (5239339).

31422377 is a wasteful number, since it uses less digits than its factorization.

31422377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1921 counting only the distinct ones).

The product of its digits is 7056, while the sum is 29.

The square root of 31422377 is about 5605.5666082922. The cubic root of 31422377 is about 315.5583512770.

The spelling of 31422377 in words is "thirty-one million, four hundred twenty-two thousand, three hundred seventy-seven".