551161783 has 2 divisors, whose sum is σ = 551161784. Its totient is φ = 551161782.

The previous prime is 551161771. The next prime is 551161789. The reversal of 551161783 is 387161155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551161783 is a prime.

It is a super-2 number, since 2×551161783² = 607558622079478178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551161789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275580891 + 275580892.

It is an arithmetic number, because the mean of its divisors is an integer number (275580892).

Almost surely, 2^551161783 is an apocalyptic number.

551161783 is a deficient number, since it is larger than the sum of its proper divisors (1).

551161783 is an equidigital number, since it uses as much as digits as its factorization.

551161783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 37.

The square root of 551161783 is about 23476.8350294498. The cubic root of 551161783 is about 819.8977579246.

The spelling of 551161783 in words is "five hundred fifty-one million, one hundred sixty-one thousand, seven hundred eighty-three".