212552257 has 4 divisors (see below), whose sum is σ = 212639680. Its totient is φ = 212464836.

The previous prime is 212552237. The next prime is 212552261. The reversal of 212552257 is 752255212.

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 a de Polignac number, because none of the positive numbers 2^k-212552257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212552237) 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, 39957 + ... + 44962.

It is an arithmetic number, because the mean of its divisors is an integer number (53159920).

Almost surely, 2^212552257 is an apocalyptic number.

It is an amenable number.

212552257 is a deficient number, since it is larger than the sum of its proper divisors (87423).

212552257 is an equidigital number, since it uses as much as digits as its factorization.

212552257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87422.

The product of its digits is 14000, while the sum is 31.

The square root of 212552257 is about 14579.1720272449. The cubic root of 212552257 is about 596.7905079162.

The spelling of 212552257 in words is "two hundred twelve million, five hundred fifty-two thousand, two hundred fifty-seven".