555671261 has 2 divisors, whose sum is σ = 555671262. Its totient is φ = 555671260.

The previous prime is 555671251. The next prime is 555671269. The reversal of 555671261 is 162176555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530611225 + 25060036 = 23035^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 555671261 - 2¹⁸ = 555409117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555671269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277835630 + 277835631.

It is an arithmetic number, because the mean of its divisors is an integer number (277835631).

Almost surely, 2^555671261 is an apocalyptic number.

It is an amenable number.

555671261 is a deficient number, since it is larger than the sum of its proper divisors (1).

555671261 is an equidigital number, since it uses as much as digits as its factorization.

555671261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

The square root of 555671261 is about 23572.6803948978. The cubic root of 555671261 is about 822.1277583147.

The spelling of 555671261 in words is "five hundred fifty-five million, six hundred seventy-one thousand, two hundred sixty-one".