551554401 has 16 divisors (see below), whose sum is σ = 777369600. Its totient is φ = 346884048.

The previous prime is 551554397. The next prime is 551554403. The reversal of 551554401 is 104455155.

It is not a de Polignac number, because 551554401 - 2² = 551554397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551554403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 33866.

It is an arithmetic number, because the mean of its divisors is an integer number (48585600).

Almost surely, 2^551554401 is an apocalyptic number.

It is an amenable number.

551554401 is a deficient number, since it is larger than the sum of its proper divisors (225815199).

551554401 is a wasteful number, since it uses less digits than its factorization.

551554401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40748.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 551554401 is about 23485.1953579271. The cubic root of 551554401 is about 820.0923953988.

The spelling of 551554401 in words is "five hundred fifty-one million, five hundred fifty-four thousand, four hundred one".