215034551 has 2 divisors, whose sum is σ = 215034552. Its totient is φ = 215034550.

The previous prime is 215034517. The next prime is 215034553. The reversal of 215034551 is 155430512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215034551 - 2²² = 210840247 is a prime.

Together with 215034553, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215034551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215034553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107517275 + 107517276.

It is an arithmetic number, because the mean of its divisors is an integer number (107517276).

Almost surely, 2^215034551 is an apocalyptic number.

215034551 is a deficient number, since it is larger than the sum of its proper divisors (1).

215034551 is an equidigital number, since it uses as much as digits as its factorization.

215034551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 215034551 is about 14664.0564306061. The cubic root of 215034551 is about 599.1047305595.

The spelling of 215034551 in words is "two hundred fifteen million, thirty-four thousand, five hundred fifty-one".