31653012 has 24 divisors (see below), whose sum is σ = 77744800. Its totient is φ = 9995616.

The previous prime is 31653001. The next prime is 31653023. The reversal of 31653012 is 21035613.

It is an interprime number because it is at equal distance from previous prime (31653001) and next prime (31653023).

It is a self number, because there is not a number n which added to its sum of digits gives 31653012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69187 + ... + 69642.

Almost surely, 2^31653012 is an apocalyptic number.

It is an amenable number.

31653012 is an abundant number, since it is smaller than the sum of its proper divisors (46091788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31653012 is a wasteful number, since it uses less digits than its factorization.

31653012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138855 (or 138853 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 31653012 is about 5626.1009589235. The cubic root of 31653012 is about 316.3285185740.

Adding to 31653012 its reverse (21035613), we get a palindrome (52688625).

The spelling of 31653012 in words is "thirty-one million, six hundred fifty-three thousand, twelve".