31400342 has 16 divisors (see below), whose sum is σ = 48559392. Its totient is φ = 15218880.

The previous prime is 31400323. The next prime is 31400399. The reversal of 31400342 is 24300413.

It is a self number, because there is not a number n which added to its sum of digits gives 31400342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12548 + ... + 14840.

It is an arithmetic number, because the mean of its divisors is an integer number (3034962).

Almost surely, 2^31400342 is an apocalyptic number.

31400342 is a deficient number, since it is larger than the sum of its proper divisors (17159050).

31400342 is a wasteful number, since it uses less digits than its factorization.

31400342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31400342 is about 5603.6008066243. The cubic root of 31400342 is about 315.4845720691.

Adding to 31400342 its reverse (24300413), we get a palindrome (55700755).

The spelling of 31400342 in words is "thirty-one million, four hundred thousand, three hundred forty-two".