212995457 has 4 divisors (see below), whose sum is σ = 213213120. Its totient is φ = 212777796.

The previous prime is 212995441. The next prime is 212995481. The reversal of 212995457 is 754599212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212995457 - 2⁴ = 212995441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212995417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107357 + ... + 109322.

It is an arithmetic number, because the mean of its divisors is an integer number (53303280).

Almost surely, 2^212995457 is an apocalyptic number.

It is an amenable number.

212995457 is a deficient number, since it is larger than the sum of its proper divisors (217663).

212995457 is an equidigital number, since it uses as much as digits as its factorization.

212995457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217662.

The product of its digits is 226800, while the sum is 44.

The square root of 212995457 is about 14594.3638778811. The cubic root of 212995457 is about 597.2050160656.

The spelling of 212995457 in words is "two hundred twelve million, nine hundred ninety-five thousand, four hundred fifty-seven".