551619427 has 4 divisors (see below), whose sum is σ = 551945800. Its totient is φ = 551293056.

The previous prime is 551619361. The next prime is 551619433. The reversal of 551619427 is 724916155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551619427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551619427.

It is not an unprimeable number, because it can be changed into a prime (551619127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160638 + ... + 164035.

It is an arithmetic number, because the mean of its divisors is an integer number (137986450).

Almost surely, 2^551619427 is an apocalyptic number.

551619427 is a deficient number, since it is larger than the sum of its proper divisors (326373).

551619427 is a wasteful number, since it uses less digits than its factorization.

551619427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326372.

The product of its digits is 75600, while the sum is 40.

The square root of 551619427 is about 23486.5797211940. The cubic root of 551619427 is about 820.1246226414.

The spelling of 551619427 in words is "five hundred fifty-one million, six hundred nineteen thousand, four hundred twenty-seven".