551115399 has 8 divisors (see below), whose sum is σ = 752743152. Its totient is φ = 358448960.

The previous prime is 551115379. The next prime is 551115413. The reversal of 551115399 is 993511155.

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

It is a cyclic number.

It is not a de Polignac number, because 551115399 - 2⁸ = 551115143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551115329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240184 + ... + 2240429.

It is an arithmetic number, because the mean of its divisors is an integer number (94092894).

Almost surely, 2^551115399 is an apocalyptic number.

551115399 is a deficient number, since it is larger than the sum of its proper divisors (201627753).

551115399 is a wasteful number, since it uses less digits than its factorization.

551115399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480657.

The product of its digits is 30375, while the sum is 39.

The square root of 551115399 is about 23475.8471412641. The cubic root of 551115399 is about 819.8747572948.

It can be divided in two parts, 5511 and 15399, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 551115399 in words is "five hundred fifty-one million, one hundred fifteen thousand, three hundred ninety-nine".