42970331 has 4 divisors (see below), whose sum is σ = 43001952. Its totient is φ = 42938712.

The previous prime is 42970313. The next prime is 42970351. The reversal of 42970331 is 13307924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42970331 - 2¹⁸ = 42708187 is a prime.

It is a super-2 number, since 2×42970331² = 3692898692499122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42970294 and 42970303.

It is not an unprimeable number, because it can be changed into a prime (42970351) 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, 13676 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (10750488).

Almost surely, 2^42970331 is an apocalyptic number.

42970331 is a deficient number, since it is larger than the sum of its proper divisors (31621).

42970331 is a wasteful number, since it uses less digits than its factorization.

42970331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31620.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 42970331 is about 6555.1758939025. The cubic root of 42970331 is about 350.2592120603.

The spelling of 42970331 in words is "forty-two million, nine hundred seventy thousand, three hundred thirty-one".