185420051 has 2 divisors, whose sum is σ = 185420052. Its totient is φ = 185420050.

The previous prime is 185420033. The next prime is 185420057. The reversal of 185420051 is 150024581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 185420051 - 2²⁶ = 118311187 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 185420051.

It is not a weakly prime, because it can be changed into another prime (185420057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92710025 + 92710026.

It is an arithmetic number, because the mean of its divisors is an integer number (92710026).

Almost surely, 2^185420051 is an apocalyptic number.

185420051 is a deficient number, since it is larger than the sum of its proper divisors (1).

185420051 is an equidigital number, since it uses as much as digits as its factorization.

185420051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 185420051 is about 13616.9031354416. The cubic root of 185420051 is about 570.2328493620.

The spelling of 185420051 in words is "one hundred eighty-five million, four hundred twenty thousand, fifty-one".