31303442 has 8 divisors (see below), whose sum is σ = 47199036. Its totient is φ = 15570432.

The previous prime is 31303429. The next prime is 31303463. The reversal of 31303442 is 24430313.

It can be written as a sum of positive squares in 2 ways, for example, as 30261001 + 1042441 = 5501^2 + 1021^2 .

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, 40163 + ... + 40934.

Almost surely, 2^31303442 is an apocalyptic number.

31303442 is a deficient number, since it is larger than the sum of its proper divisors (15895594).

31303442 is a wasteful number, since it uses less digits than its factorization.

31303442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81292.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31303442 is about 5594.9478996681. The cubic root of 31303442 is about 315.1597140852.

Adding to 31303442 its reverse (24430313), we get a palindrome (55733755).

The spelling of 31303442 in words is "thirty-one million, three hundred three thousand, four hundred forty-two".