551425805 has 16 divisors (see below), whose sum is σ = 789122304. Its totient is φ = 361680000.

The previous prime is 551425793. The next prime is 551425811. The reversal of 551425805 is 508524155.

It is not a de Polignac number, because 551425805 - 2¹⁰ = 551424781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341696 + ... + 343305.

It is an arithmetic number, because the mean of its divisors is an integer number (49320144).

Almost surely, 2^551425805 is an apocalyptic number.

It is an amenable number.

551425805 is a deficient number, since it is larger than the sum of its proper divisors (237696499).

551425805 is a wasteful number, since it uses less digits than its factorization.

551425805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685036.

The product of its (nonzero) digits is 40000, while the sum is 35.

The square root of 551425805 is about 23482.4573884421. The cubic root of 551425805 is about 820.0286550565.

The spelling of 551425805 in words is "five hundred fifty-one million, four hundred twenty-five thousand, eight hundred five".