31442212 has 6 divisors (see below), whose sum is σ = 55023878. Its totient is φ = 15721104.

The previous prime is 31442189. The next prime is 31442239. The reversal of 31442212 is 21224413.

It can be written as a sum of positive squares in only one way, i.e., 28901376 + 2540836 = 5376^2 + 1594^2 .

It is a super-2 number, since 2×31442212² = 1977225390905888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31442212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930273 + ... + 3930280.

Almost surely, 2^31442212 is an apocalyptic number.

It is an amenable number.

31442212 is a deficient number, since it is larger than the sum of its proper divisors (23581666).

31442212 is a wasteful number, since it uses less digits than its factorization.

31442212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860557 (or 7860555 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 31442212 is about 5607.3355526489. The cubic root of 31442212 is about 315.6247347905.

Adding to 31442212 its reverse (21224413), we get a palindrome (52666625).

It can be divided in two parts, 3144 and 2212, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 31442212 in words is "thirty-one million, four hundred forty-two thousand, two hundred twelve".