31132212 has 12 divisors (see below), whose sum is σ = 72641856. Its totient is φ = 10377400.

The previous prime is 31132201. The next prime is 31132223. The reversal of 31132212 is 21223113.

It is an interprime number because it is at equal distance from previous prime (31132201) and next prime (31132223).

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 junction number, because it is equal to n+sod(n) for n = 31132191 and 31132200.

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, 1297164 + ... + 1297187.

It is an arithmetic number, because the mean of its divisors is an integer number (6053488).

Almost surely, 2^31132212 is an apocalyptic number.

It is an amenable number.

31132212 is an abundant number, since it is smaller than the sum of its proper divisors (41509644).

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

31132212 is a wasteful number, since it uses less digits than its factorization.

31132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594358 (or 2594356 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 31132212 is about 5579.6247185631. The cubic root of 31132212 is about 314.5840213348.

Adding to 31132212 its reverse (21223113), we get a palindrome (52355325).

Subtracting from 31132212 its reverse (21223113), we obtain a palindrome (9909099).

It can be divided in two parts, 311 and 32212, that added together give a palindrome (32523).

The spelling of 31132212 in words is "thirty-one million, one hundred thirty-two thousand, two hundred twelve".