211056431 has 2 divisors, whose sum is σ = 211056432. Its totient is φ = 211056430.

The previous prime is 211056407. The next prime is 211056451. The reversal of 211056431 is 134650112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211056431 - 2¹⁰ = 211055407 is a prime.

It is a super-2 number, since 2×211056431² = 89089634132915522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211056397 and 211056406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211056451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105528215 + 105528216.

It is an arithmetic number, because the mean of its divisors is an integer number (105528216).

Almost surely, 2^211056431 is an apocalyptic number.

211056431 is a deficient number, since it is larger than the sum of its proper divisors (1).

211056431 is an equidigital number, since it uses as much as digits as its factorization.

211056431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 211056431 is about 14527.7813516036. The cubic root of 211056431 is about 595.3872497320.

The spelling of 211056431 in words is "two hundred eleven million, fifty-six thousand, four hundred thirty-one".