31553142 has 16 divisors (see below), whose sum is σ = 64574400. Its totient is φ = 10273032.

The previous prime is 31553089. The next prime is 31553161. The reversal of 31553142 is 24135513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60892 + ... + 61407.

It is an arithmetic number, because the mean of its divisors is an integer number (4035900).

Almost surely, 2^31553142 is an apocalyptic number.

31553142 is an abundant number, since it is smaller than the sum of its proper divisors (33021258).

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

31553142 is a wasteful number, since it uses less digits than its factorization.

31553142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122347.

The product of its digits is 1800, while the sum is 24.

The square root of 31553142 is about 5617.2183507498. The cubic root of 31553142 is about 315.9954800934.

Adding to 31553142 its reverse (24135513), we get a palindrome (55688655).

The spelling of 31553142 in words is "thirty-one million, five hundred fifty-three thousand, one hundred forty-two".