31622138 has 12 divisors (see below), whose sum is σ = 47915322. Its totient is φ = 15651960.

The previous prime is 31622131. The next prime is 31622141. The reversal of 31622138 is 83122613.

It can be written as a sum of positive squares in only one way, i.e., 27489049 + 4133089 = 5243^2 + 2033^2 .

It is a super-2 number, since 2×31622138² = 1999919223382088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31622131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22208 + ... + 23588.

Almost surely, 2^31622138 is an apocalyptic number.

31622138 is a deficient number, since it is larger than the sum of its proper divisors (16293184).

31622138 is a wasteful number, since it uses less digits than its factorization.

31622138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1490 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 31622138 is about 5623.3564710056. The cubic root of 31622138 is about 316.2256373302.

The spelling of 31622138 in words is "thirty-one million, six hundred twenty-two thousand, one hundred thirty-eight".