212650457 has 4 divisors (see below), whose sum is σ = 213211920. Its totient is φ = 212088996.

The previous prime is 212650411. The next prime is 212650511. The reversal of 212650457 is 754056212.

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 212650457 - 2⁸ = 212650201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212650057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280163 + ... + 280920.

It is an arithmetic number, because the mean of its divisors is an integer number (53302980).

Almost surely, 2^212650457 is an apocalyptic number.

It is an amenable number.

212650457 is a deficient number, since it is larger than the sum of its proper divisors (561463).

212650457 is an equidigital number, since it uses as much as digits as its factorization.

212650457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561462.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 212650457 is about 14582.5394564870. The cubic root of 212650457 is about 596.8824003066.

The spelling of 212650457 in words is "two hundred twelve million, six hundred fifty thousand, four hundred fifty-seven".