42557051 has 2 divisors, whose sum is σ = 42557052. Its totient is φ = 42557050.

The previous prime is 42556999. The next prime is 42557059. The reversal of 42557051 is 15075524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42557051 is a prime.

It is a super-2 number, since 2×42557051² = 3622205179633202, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42557059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278525 + 21278526.

It is an arithmetic number, because the mean of its divisors is an integer number (21278526).

Almost surely, 2^42557051 is an apocalyptic number.

42557051 is a deficient number, since it is larger than the sum of its proper divisors (1).

42557051 is an equidigital number, since it uses as much as digits as its factorization.

42557051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 42557051 is about 6523.5765497157. The cubic root of 42557051 is about 349.1326851855.

The spelling of 42557051 in words is "forty-two million, five hundred fifty-seven thousand, fifty-one".