31145456 has 20 divisors (see below), whose sum is σ = 60443304. Its totient is φ = 15547200.

The previous prime is 31145437. The next prime is 31145467. The reversal of 31145456 is 65454113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11951 + ... + 14321.

Almost surely, 2^31145456 is an apocalyptic number.

It is an amenable number.

31145456 is a deficient number, since it is larger than the sum of its proper divisors (29297848).

31145456 is a wasteful number, since it uses less digits than its factorization.

31145456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200 (or 3194 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 31145456 is about 5580.8114105388. The cubic root of 31145456 is about 314.6286242273.

Adding to 31145456 its reverse (65454113), we get a palindrome (96599569).

The spelling of 31145456 in words is "thirty-one million, one hundred forty-five thousand, four hundred fifty-six".