623272581 has 12 divisors (see below), whose sum is σ = 953240652. Its totient is φ = 391072896.

The previous prime is 623272579. The next prime is 623272589. The reversal of 623272581 is 185272326.

623272581 is a `hidden beast` number, since 6 + 2 + 3 + 2 + 72 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 398002500 + 225270081 = 19950^2 + 15009^2 .

It is not a de Polignac number, because 623272581 - 2¹ = 623272579 is a prime.

It is a super-2 number, since 2×623272581² = 776937420452803122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623272589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2036686 + ... + 2036991.

It is an arithmetic number, because the mean of its divisors is an integer number (79436721).

Almost surely, 2^623272581 is an apocalyptic number.

It is an amenable number.

623272581 is a deficient number, since it is larger than the sum of its proper divisors (329968071).

623272581 is a wasteful number, since it uses less digits than its factorization.

623272581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073700 (or 4073697 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 623272581 is about 24965.4277151424. The cubic root of 623272581 is about 854.1995545452.

The spelling of 623272581 in words is "six hundred twenty-three million, two hundred seventy-two thousand, five hundred eighty-one".