551355401 has 2 divisors, whose sum is σ = 551355402. Its totient is φ = 551355400.

The previous prime is 551355383. The next prime is 551355403. The reversal of 551355401 is 104553155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485761600 + 65593801 = 22040^2 + 8099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551355401 is a prime.

It is a Sophie Germain prime.

Together with 551355403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (551355403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275677700 + 275677701.

It is an arithmetic number, because the mean of its divisors is an integer number (275677701).

Almost surely, 2^551355401 is an apocalyptic number.

It is an amenable number.

551355401 is a deficient number, since it is larger than the sum of its proper divisors (1).

551355401 is an equidigital number, since it uses as much as digits as its factorization.

551355401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 551355401 is about 23480.9582640914. The cubic root of 551355401 is about 819.9937541662.

The spelling of 551355401 in words is "five hundred fifty-one million, three hundred fifty-five thousand, four hundred one".