42931863 has 20 divisors (see below), whose sum is σ = 69067768. Its totient is φ = 26418960.

The previous prime is 42931843. The next prime is 42931883. The reversal of 42931863 is 36813924.

It is an interprime number because it is at equal distance from previous prime (42931843) and next prime (42931883).

It is not a de Polignac number, because 42931863 - 2⁵ = 42931831 is a prime.

It is a Duffinian number.

It is a congruent 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 19 ways as a sum of consecutive naturals, for example, 19333 + ... + 21438.

Almost surely, 2^42931863 is an apocalyptic number.

42931863 is a deficient number, since it is larger than the sum of its proper divisors (26135905).

42931863 is a wasteful number, since it uses less digits than its factorization.

42931863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40796 (or 40787 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 42931863 is about 6552.2410669938. The cubic root of 42931863 is about 350.1546608988.

The spelling of 42931863 in words is "forty-two million, nine hundred thirty-one thousand, eight hundred sixty-three".