31145152 has 14 divisors (see below), whose sum is σ = 61803788. Its totient is φ = 15572544.

The previous prime is 31145143. The next prime is 31145167. The reversal of 31145152 is 25154113.

It is a happy number.

It is a super-3 number, since 3×31145152³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 243258 + ... + 243385.

Almost surely, 2^31145152 is an apocalyptic number.

31145152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31145152 is a deficient number, since it is larger than the sum of its proper divisors (30658636).

31145152 is an equidigital number, since it uses as much as digits as its factorization.

31145152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486655 (or 486645 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 31145152 is about 5580.7841742895. The cubic root of 31145152 is about 314.6276005636.

Adding to 31145152 its reverse (25154113), we get a palindrome (56299265).

The spelling of 31145152 in words is "thirty-one million, one hundred forty-five thousand, one hundred fifty-two".