31424402 has 8 divisors (see below), whose sum is σ = 47577456. Its totient is φ = 15565252.

The previous prime is 31424401. The next prime is 31424467. The reversal of 31424402 is 20442413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31424401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73208 + ... + 73635.

It is an arithmetic number, because the mean of its divisors is an integer number (5947182).

Almost surely, 2^31424402 is an apocalyptic number.

31424402 is a deficient number, since it is larger than the sum of its proper divisors (16153054).

31424402 is a wasteful number, since it uses less digits than its factorization.

31424402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146952.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31424402 is about 5605.7472294066. The cubic root of 31424402 is about 315.5651298002.

Adding to 31424402 its reverse (20442413), we get a palindrome (51866815).

The spelling of 31424402 in words is "thirty-one million, four hundred twenty-four thousand, four hundred two".