551623723 has 6 divisors (see below), whose sum is σ = 641684796. Its totient is φ = 472820292.

The previous prime is 551623679. The next prime is 551623729. The reversal of 551623723 is 327326155.

It is not a de Polignac number, because 551623723 - 2¹³ = 551615531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551623729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5628765 + ... + 5628862.

It is an arithmetic number, because the mean of its divisors is an integer number (106947466).

Almost surely, 2^551623723 is an apocalyptic number.

551623723 is a deficient number, since it is larger than the sum of its proper divisors (90061073).

551623723 is a wasteful number, since it uses less digits than its factorization.

551623723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11257641 (or 11257634 counting only the distinct ones).

The product of its digits is 37800, while the sum is 34.

The square root of 551623723 is about 23486.6711774998. The cubic root of 551623723 is about 820.1267516734.

Adding to 551623723 its reverse (327326155), we get a palindrome (878949878).

It can be divided in two parts, 55162 and 3723, that added together give a palindrome (58885).

The spelling of 551623723 in words is "five hundred fifty-one million, six hundred twenty-three thousand, seven hundred twenty-three".