551404157 has 2 divisors, whose sum is σ = 551404158. Its totient is φ = 551404156.

The previous prime is 551404153. The next prime is 551404159. The reversal of 551404157 is 751404155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357247801 + 194156356 = 18901^2 + 13934^2 .

It is a cyclic number.

It is not a de Polignac number, because 551404157 - 2² = 551404153 is a prime.

Together with 551404159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551404153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275702078 + 275702079.

It is an arithmetic number, because the mean of its divisors is an integer number (275702079).

Almost surely, 2^551404157 is an apocalyptic number.

It is an amenable number.

551404157 is a deficient number, since it is larger than the sum of its proper divisors (1).

551404157 is an equidigital number, since it uses as much as digits as its factorization.

551404157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 551404157 is about 23481.9964440846. The cubic root of 551404157 is about 820.0179239588.

The spelling of 551404157 in words is "five hundred fifty-one million, four hundred four thousand, one hundred fifty-seven".