212995657 has 8 divisors (see below), whose sum is σ = 245787776. Its totient is φ = 180794592.

The previous prime is 212995639. The next prime is 212995759. The reversal of 212995657 is 756599212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212995657 - 2¹¹ = 212993609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212995357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146988 + ... + 148429.

It is an arithmetic number, because the mean of its divisors is an integer number (30723472).

Almost surely, 2^212995657 is an apocalyptic number.

It is an amenable number.

212995657 is a deficient number, since it is larger than the sum of its proper divisors (32792119).

212995657 is a wasteful number, since it uses less digits than its factorization.

212995657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295527.

The product of its digits is 340200, while the sum is 46.

The square root of 212995657 is about 14594.3707298396. The cubic root of 212995657 is about 597.2052029882.

The spelling of 212995657 in words is "two hundred twelve million, nine hundred ninety-five thousand, six hundred fifty-seven".