31142522 has 4 divisors (see below), whose sum is σ = 46713786. Its totient is φ = 15571260.

The previous prime is 31142497. The next prime is 31142537. The reversal of 31142522 is 22524113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22524113 = 719 ⋅31327.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 11703241 = 4409^2 + 3421^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31142494 and 31142503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7785629 + ... + 7785632.

Almost surely, 2^31142522 is an apocalyptic number.

31142522 is a deficient number, since it is larger than the sum of its proper divisors (15571264).

31142522 is a wasteful number, since it uses less digits than its factorization.

31142522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571263.

The product of its digits is 480, while the sum is 20.

The square root of 31142522 is about 5580.5485393463. The cubic root of 31142522 is about 314.6187442481.

Adding to 31142522 its reverse (22524113), we get a palindrome (53666635).

The spelling of 31142522 in words is "thirty-one million, one hundred forty-two thousand, five hundred twenty-two".