551398 has 4 divisors (see below), whose sum is σ = 827100. Its totient is φ = 275698.

The previous prime is 551387. The next prime is 551407. The reversal of 551398 is 893155.

551398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137848 + ... + 137851.

It is an arithmetic number, because the mean of its divisors is an integer number (206775).

2⁵⁵¹³⁹⁸ is an apocalyptic number.

551398 is a deficient number, since it is larger than the sum of its proper divisors (275702).

551398 is a wasteful number, since it uses less digits than its factorization.

551398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275701.

The product of its digits is 5400, while the sum is 31.

The square root of 551398 is about 742.5617819414. The cubic root of 551398 is about 82.0014871830.

It can be divided in two parts, 551 and 398, that added together give a palindrome (949).

The spelling of 551398 in words is "five hundred fifty-one thousand, three hundred ninety-eight".