31230442 has 16 divisors (see below), whose sum is σ = 48837600. Its totient is φ = 14964048.

The previous prime is 31230439. The next prime is 31230449. The reversal of 31230442 is 24403213.

It is not an unprimeable number, because it can be changed into a prime (31230449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809 + ... + 8107.

It is an arithmetic number, because the mean of its divisors is an integer number (3052350).

Almost surely, 2^31230442 is an apocalyptic number.

31230442 is a deficient number, since it is larger than the sum of its proper divisors (17607158).

31230442 is a wasteful number, since it uses less digits than its factorization.

31230442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31230442 is about 5588.4203492579. The cubic root of 31230442 is about 314.9145379981.

Adding to 31230442 its reverse (24403213), we get a palindrome (55633655).

The spelling of 31230442 in words is "thirty-one million, two hundred thirty thousand, four hundred forty-two".