31353042 has 48 divisors (see below), whose sum is σ = 74528640. Its totient is φ = 8763552.

The previous prime is 31353017. The next prime is 31353053. The reversal of 31353042 is 24035313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12684 + ... + 14952.

It is an arithmetic number, because the mean of its divisors is an integer number (1552680).

Almost surely, 2^31353042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31353042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37264320).

31353042 is an abundant number, since it is smaller than the sum of its proper divisors (43175598).

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

31353042 is a wasteful number, since it uses less digits than its factorization.

31353042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 31353042 is about 5599.3787155362. The cubic root of 31353042 is about 315.3260820826.

Adding to 31353042 its reverse (24035313), we get a palindrome (55388355).

The spelling of 31353042 in words is "thirty-one million, three hundred fifty-three thousand, forty-two".