211256345 has 16 divisors (see below), whose sum is σ = 267252480. Its totient is φ = 159868800.

The previous prime is 211256341. The next prime is 211256369. The reversal of 211256345 is 543652112.

It is not a de Polignac number, because 211256345 - 2² = 211256341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211256341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85325 + ... + 87765.

It is an arithmetic number, because the mean of its divisors is an integer number (16703280).

Almost surely, 2^211256345 is an apocalyptic number.

It is an amenable number.

211256345 is a deficient number, since it is larger than the sum of its proper divisors (55996135).

211256345 is a wasteful number, since it uses less digits than its factorization.

211256345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376.

The product of its digits is 7200, while the sum is 29.

The square root of 211256345 is about 14534.6601267453. The cubic root of 211256345 is about 595.5751752788.

The spelling of 211256345 in words is "two hundred eleven million, two hundred fifty-six thousand, three hundred forty-five".