31040342 has 4 divisors (see below), whose sum is σ = 46560516. Its totient is φ = 15520170.

The previous prime is 31040329. The next prime is 31040369. The reversal of 31040342 is 24304013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24304013 = 823 ⋅29531.

It is a self number, because there is not a number n which added to its sum of digits gives 31040342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7760084 + ... + 7760087.

It is an arithmetic number, because the mean of its divisors is an integer number (11640129).

Almost surely, 2^31040342 is an apocalyptic number.

31040342 is a deficient number, since it is larger than the sum of its proper divisors (15520174).

31040342 is a wasteful number, since it uses less digits than its factorization.

31040342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15520173.

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

The square root of 31040342 is about 5571.3860035004. The cubic root of 31040342 is about 314.2742745344.

Adding to 31040342 its reverse (24304013), we get a palindrome (55344355).

The spelling of 31040342 in words is "thirty-one million, forty thousand, three hundred forty-two".