212451345 has 24 divisors (see below), whose sum is σ = 384261696. Its totient is φ = 108380448.

The previous prime is 212451319. The next prime is 212451359. The reversal of 212451345 is 543154212.

It is not a de Polignac number, because 212451345 - 2⁵ = 212451313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101599 + ... + 103668.

It is an arithmetic number, because the mean of its divisors is an integer number (16010904).

Almost surely, 2^212451345 is an apocalyptic number.

It is an amenable number.

212451345 is a deficient number, since it is larger than the sum of its proper divisors (171810351).

212451345 is a wasteful number, since it uses less digits than its factorization.

212451345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205301 (or 205298 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 212451345 is about 14575.7107888432. The cubic root of 212451345 is about 596.6960482325.

The spelling of 212451345 in words is "two hundred twelve million, four hundred fifty-one thousand, three hundred forty-five".