624550081 has 9 divisors (see below), whose sum is σ = 635715171. Its totient is φ = 613579032.

The previous prime is 624550049. The next prime is 624550109. The reversal of 624550081 is 180055426.

The square root of 624550081 is 24991.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 339480625 + 285069456 = 18425^2 + 16884^2 .

It is not a de Polignac number, because 624550081 - 2⁵ = 624550049 is a prime.

It is a super-2 number, since 2×624550081² = 780125607354213122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624550001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1674211 + ... + 1674583.

It is an arithmetic number, because the mean of its divisors is an integer number (70635019).

Almost surely, 2^624550081 is an apocalyptic number.

624550081 is the 24991-st square number.

624550081 is the 12496-th centered octagonal number.

It is an amenable number.

624550081 is a deficient number, since it is larger than the sum of its proper divisors (11165090).

624550081 is an frugal number, since it uses more digits than its factorization.

624550081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The cubic root of 624550081 is about 854.7827639110.

The spelling of 624550081 in words is "six hundred twenty-four million, five hundred fifty thousand, eighty-one".