42664351 has 4 divisors (see below), whose sum is σ = 43078672. Its totient is φ = 42250032.

The previous prime is 42664331. The next prime is 42664357. The reversal of 42664351 is 15346624.

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 42664351 - 2⁹ = 42663839 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 (42664357) 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, 207006 + ... + 207211.

It is an arithmetic number, because the mean of its divisors is an integer number (10769668).

Almost surely, 2^42664351 is an apocalyptic number.

42664351 is a deficient number, since it is larger than the sum of its proper divisors (414321).

42664351 is a wasteful number, since it uses less digits than its factorization.

42664351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414320.

The product of its digits is 17280, while the sum is 31.

The square root of 42664351 is about 6531.7953887120. The cubic root of 42664351 is about 349.4258641515.

The spelling of 42664351 in words is "forty-two million, six hundred sixty-four thousand, three hundred fifty-one".