31372242 has 32 divisors (see below), whose sum is σ = 72477504. Its totient is φ = 8947200.

The previous prime is 31372219. The next prime is 31372283. The reversal of 31372242 is 24227313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12859 + ... + 15102.

It is an arithmetic number, because the mean of its divisors is an integer number (2264922).

Almost surely, 2^31372242 is an apocalyptic number.

31372242 is an abundant number, since it is smaller than the sum of its proper divisors (41105262).

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

31372242 is a wasteful number, since it uses less digits than its factorization.

31372242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27994.

The product of its digits is 2016, while the sum is 24.

The square root of 31372242 is about 5601.0929290630. The cubic root of 31372242 is about 315.3904354911.

Adding to 31372242 its reverse (24227313), we get a palindrome (55599555).

Subtracting from 31372242 its reverse (24227313), we obtain a square (7144929 = 2673²).

It can be divided in two parts, 31 and 372242, that added together give a palindrome (372273).

The spelling of 31372242 in words is "thirty-one million, three hundred seventy-two thousand, two hundred forty-two".