215054525141557 has 2 divisors, whose sum is σ = 215054525141558. Its totient is φ = 215054525141556.

The previous prime is 215054525141497. The next prime is 215054525141581. The reversal of 215054525141557 is 755141525450512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128569156479556 + 86485368662001 = 11338834^2 + 9299751^2 .

It is a cyclic number.

It is not a de Polignac number, because 215054525141557 - 2⁷ = 215054525141429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215054525141587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107527262570778 + 107527262570779.

It is an arithmetic number, because the mean of its divisors is an integer number (107527262570779).

Almost surely, 2^{215054525141557} is an apocalyptic number.

It is an amenable number.

215054525141557 is a deficient number, since it is larger than the sum of its proper divisors (1).

215054525141557 is an equidigital number, since it uses as much as digits as its factorization.

215054525141557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000000, while the sum is 52.

The spelling of 215054525141557 in words is "two hundred fifteen trillion, fifty-four billion, five hundred twenty-five million, one hundred forty-one thousand, five hundred fifty-seven".