213556051 has 2 divisors, whose sum is σ = 213556052. Its totient is φ = 213556050.

The previous prime is 213556043. The next prime is 213556061. The reversal of 213556051 is 150655312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213556051 - 2³ = 213556043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213556061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106778025 + 106778026.

It is an arithmetic number, because the mean of its divisors is an integer number (106778026).

Almost surely, 2^213556051 is an apocalyptic number.

213556051 is a deficient number, since it is larger than the sum of its proper divisors (1).

213556051 is an equidigital number, since it uses as much as digits as its factorization.

213556051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 213556051 is about 14613.5570960667. The cubic root of 213556051 is about 597.7284955574.

The spelling of 213556051 in words is "two hundred thirteen million, five hundred fifty-six thousand, fifty-one".