212158057 has 2 divisors, whose sum is σ = 212158058. Its totient is φ = 212158056.

The previous prime is 212158039. The next prime is 212158069. The reversal of 212158057 is 750851212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212110096 + 47961 = 14564^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 212158057 - 2¹⁵ = 212125289 is a prime.

It is a super-2 number, since 2×212158057² = 90022082300030498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212158007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106079028 + 106079029.

It is an arithmetic number, because the mean of its divisors is an integer number (106079029).

Almost surely, 2^212158057 is an apocalyptic number.

It is an amenable number.

212158057 is a deficient number, since it is larger than the sum of its proper divisors (1).

212158057 is an equidigital number, since it uses as much as digits as its factorization.

212158057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 212158057 is about 14565.6464669441. The cubic root of 212158057 is about 596.4213431653.

The spelling of 212158057 in words is "two hundred twelve million, one hundred fifty-eight thousand, fifty-seven".