31443612 has 12 divisors (see below), whose sum is σ = 73368456. Its totient is φ = 10481200.

The previous prime is 31443593. The next prime is 31443631. The reversal of 31443612 is 21634413.

It is an interprime number because it is at equal distance from previous prime (31443593) and next prime (31443631).

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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, 1310139 + ... + 1310162.

It is an arithmetic number, because the mean of its divisors is an integer number (6114038).

Almost surely, 2^31443612 is an apocalyptic number.

It is an amenable number.

31443612 is an abundant number, since it is smaller than the sum of its proper divisors (41924844).

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

31443612 is a wasteful number, since it uses less digits than its factorization.

31443612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620308 (or 2620306 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 31443612 is about 5607.4603877335. The cubic root of 31443612 is about 315.6294192369.

The spelling of 31443612 in words is "thirty-one million, four hundred forty-three thousand, six hundred twelve".