42920231 has 8 divisors (see below), whose sum is σ = 44984160. Its totient is φ = 40872832.

The previous prime is 42920209. The next prime is 42920263. The reversal of 42920231 is 13202924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42920231 - 2¹⁸ = 42658087 is a prime.

It is a super-2 number, since 2×42920231² = 3684292458186722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42920197 and 42920206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42920431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (5623020).

Almost surely, 2^42920231 is an apocalyptic number.

42920231 is a deficient number, since it is larger than the sum of its proper divisors (2063929).

42920231 is a wasteful number, since it uses less digits than its factorization.

42920231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42920231 is about 6551.3533716325. The cubic root of 42920231 is about 350.1230342961.

The spelling of 42920231 in words is "forty-two million, nine hundred twenty thousand, two hundred thirty-one".