215706053 has 2 divisors, whose sum is σ = 215706054. Its totient is φ = 215706052.

The previous prime is 215706019. The next prime is 215706079. The reversal of 215706053 is 350607512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188842564 + 26863489 = 13742^2 + 5183^2 .

It is a cyclic number.

It is not a de Polignac number, because 215706053 - 2¹⁸ = 215443909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215706083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107853026 + 107853027.

It is an arithmetic number, because the mean of its divisors is an integer number (107853027).

Almost surely, 2^215706053 is an apocalyptic number.

It is an amenable number.

215706053 is a deficient number, since it is larger than the sum of its proper divisors (1).

215706053 is an equidigital number, since it uses as much as digits as its factorization.

215706053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 215706053 is about 14686.9347721027. The cubic root of 215706053 is about 599.7277032947.

The spelling of 215706053 in words is "two hundred fifteen million, seven hundred six thousand, fifty-three".