211264531 has 2 divisors, whose sum is σ = 211264532. Its totient is φ = 211264530.

The previous prime is 211264523. The next prime is 211264541. The reversal of 211264531 is 135462112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211264531 - 2³ = 211264523 is a prime.

It is a super-2 number, since 2×211264531² = 89265404117299922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211264496 and 211264505.

It is not a weakly prime, because it can be changed into another prime (211264541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105632265 + 105632266.

It is an arithmetic number, because the mean of its divisors is an integer number (105632266).

Almost surely, 2^211264531 is an apocalyptic number.

211264531 is a deficient number, since it is larger than the sum of its proper divisors (1).

211264531 is an equidigital number, since it uses as much as digits as its factorization.

211264531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 211264531 is about 14534.9417267494. The cubic root of 211264531 is about 595.5828678531.

The spelling of 211264531 in words is "two hundred eleven million, two hundred sixty-four thousand, five hundred thirty-one".