211431051 has 24 divisors (see below), whose sum is σ = 335899200. Its totient is φ = 127339776.

The previous prime is 211431047. The next prime is 211431071. The reversal of 211431051 is 150134112.

211431051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211431051 - 2² = 211431047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211431071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13726 + ... + 24723.

It is an arithmetic number, because the mean of its divisors is an integer number (13995800).

Almost surely, 2^211431051 is an apocalyptic number.

211431051 is a deficient number, since it is larger than the sum of its proper divisors (124468149).

211431051 is a wasteful number, since it uses less digits than its factorization.

211431051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38515 (or 38512 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 211431051 is about 14540.6688635702. The cubic root of 211431051 is about 595.7393074488.

Adding to 211431051 its reverse (150134112), we get a palindrome (361565163).

The spelling of 211431051 in words is "two hundred eleven million, four hundred thirty-one thousand, fifty-one".