42931313 has 4 divisors (see below), whose sum is σ = 42946560. Its totient is φ = 42916068.

The previous prime is 42931309. The next prime is 42931321. The reversal of 42931313 is 31313924.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42931313 - 2² = 42931309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42931813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033 + ... + 9486.

It is an arithmetic number, because the mean of its divisors is an integer number (10736640).

Almost surely, 2^42931313 is an apocalyptic number.

It is an amenable number.

42931313 is a deficient number, since it is larger than the sum of its proper divisors (15247).

42931313 is a wasteful number, since it uses less digits than its factorization.

42931313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246.

The product of its digits is 1944, while the sum is 26.

The square root of 42931313 is about 6552.1990964866. The cubic root of 42931313 is about 350.1531656156.

The spelling of 42931313 in words is "forty-two million, nine hundred thirty-one thousand, three hundred thirteen".