211251045 has 32 divisors (see below), whose sum is σ = 347859072. Its totient is φ = 109412352.

The previous prime is 211251013. The next prime is 211251049. The reversal of 211251045 is 540152112.

It is not a de Polignac number, because 211251045 - 2⁵ = 211251013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211251049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123637 + ... + 125333.

It is an arithmetic number, because the mean of its divisors is an integer number (10870596).

Almost surely, 2^211251045 is an apocalyptic number.

It is an amenable number.

211251045 is a deficient number, since it is larger than the sum of its proper divisors (136608027).

211251045 is a wasteful number, since it uses less digits than its factorization.

211251045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 211251045 is about 14534.4778027970. The cubic root of 211251045 is about 595.5701946397.

The spelling of 211251045 in words is "two hundred eleven million, two hundred fifty-one thousand, forty-five".