31442402 has 8 divisors (see below), whose sum is σ = 47408556. Its totient is φ = 15639552.

The previous prime is 31442381. The next prime is 31442413. The reversal of 31442402 is 20424413.

It can be written as a sum of positive squares in 2 ways, for example, as 28313041 + 3129361 = 5321^2 + 1769^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40343 + ... + 41114.

Almost surely, 2^31442402 is an apocalyptic number.

31442402 is a deficient number, since it is larger than the sum of its proper divisors (15966154).

31442402 is a wasteful number, since it uses less digits than its factorization.

31442402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81652.

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

The square root of 31442402 is about 5607.3524947162. The cubic root of 31442402 is about 315.6253705449.

Adding to 31442402 its reverse (20424413), we get a palindrome (51866815).

The spelling of 31442402 in words is "thirty-one million, four hundred forty-two thousand, four hundred two".