42256051 has 4 divisors (see below), whose sum is σ = 42369712. Its totient is φ = 42142392.

The previous prime is 42256021. The next prime is 42256061. The reversal of 42256051 is 15065224.

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 42256051 - 2⁷ = 42255923 is a prime.

It is a super-2 number, since 2×42256051² = 3571147692229202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42256001) 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, 56271 + ... + 57016.

It is an arithmetic number, because the mean of its divisors is an integer number (10592428).

Almost surely, 2^42256051 is an apocalyptic number.

42256051 is a deficient number, since it is larger than the sum of its proper divisors (113661).

42256051 is a wasteful number, since it uses less digits than its factorization.

42256051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113660.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 42256051 is about 6500.4654448739. The cubic root of 42256051 is about 348.3076148885.

The spelling of 42256051 in words is "forty-two million, two hundred fifty-six thousand, fifty-one".