551444261 has 2 divisors, whose sum is σ = 551444262. Its totient is φ = 551444260.

The previous prime is 551444183. The next prime is 551444269. The reversal of 551444261 is 162444155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539679361 + 11764900 = 23231^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 551444261 - 2¹⁰ = 551443237 is a prime.

It is a super-2 number, since 2×551444261² = 608181545979672242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551444269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275722130 + 275722131.

It is an arithmetic number, because the mean of its divisors is an integer number (275722131).

Almost surely, 2^551444261 is an apocalyptic number.

It is an amenable number.

551444261 is a deficient number, since it is larger than the sum of its proper divisors (1).

551444261 is an equidigital number, since it uses as much as digits as its factorization.

551444261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 551444261 is about 23482.8503593580. The cubic root of 551444261 is about 820.0378036309.

The spelling of 551444261 in words is "five hundred fifty-one million, four hundred forty-four thousand, two hundred sixty-one".