551138694 has 8 divisors (see below), whose sum is σ = 1102277400. Its totient is φ = 183712896.

The previous prime is 551138669. The next prime is 551138699. The reversal of 551138694 is 496831155.

It is a sphenic number, since it is the product of 3 distinct primes.

551138694 is an admirable number.

It is a super-3 number, since 3×551138694³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551138699) 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, 45928219 + ... + 45928230.

It is an arithmetic number, because the mean of its divisors is an integer number (137784675).

Almost surely, 2^551138694 is an apocalyptic number.

551138694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551138694 is a wasteful number, since it uses less digits than its factorization.

551138694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91856454.

The product of its digits is 129600, while the sum is 42.

The square root of 551138694 is about 23476.3432842511. The cubic root of 551138694 is about 819.8863088461.

The spelling of 551138694 in words is "five hundred fifty-one million, one hundred thirty-eight thousand, six hundred ninety-four".