551540155513 has 2 divisors, whose sum is σ = 551540155514. Its totient is φ = 551540155512.

The previous prime is 551540155471. The next prime is 551540155547. The reversal of 551540155513 is 315551045155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540441111609 + 11099043904 = 735147^2 + 105352^2 .

It is a cyclic number.

It is not a de Polignac number, because 551540155513 - 2³⁷ = 414101202041 is a prime.

It is not a weakly prime, because it can be changed into another prime (551540155013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275770077756 + 275770077757.

It is an arithmetic number, because the mean of its divisors is an integer number (275770077757).

Almost surely, 2^551540155513 is an apocalyptic number.

It is an amenable number.

551540155513 is a deficient number, since it is larger than the sum of its proper divisors (1).

551540155513 is an equidigital number, since it uses as much as digits as its factorization.

551540155513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 187500, while the sum is 40.

The spelling of 551540155513 in words is "five hundred fifty-one billion, five hundred forty million, one hundred fifty-five thousand, five hundred thirteen".