213155057 has 2 divisors, whose sum is σ = 213155058. Its totient is φ = 213155056.

The previous prime is 213155051. The next prime is 213155071. The reversal of 213155057 is 750551312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205951201 + 7203856 = 14351^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 213155057 - 2¹² = 213150961 is a prime.

It is not a weakly prime, because it can be changed into another prime (213155051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106577528 + 106577529.

It is an arithmetic number, because the mean of its divisors is an integer number (106577529).

Almost surely, 2^213155057 is an apocalyptic number.

It is an amenable number.

213155057 is a deficient number, since it is larger than the sum of its proper divisors (1).

213155057 is an equidigital number, since it uses as much as digits as its factorization.

213155057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 213155057 is about 14599.8307181967. The cubic root of 213155057 is about 597.3541430708.

The spelling of 213155057 in words is "two hundred thirteen million, one hundred fifty-five thousand, fifty-seven".