180724621 has 16 divisors (see below), whose sum is σ = 226505088. Its totient is φ = 140083200.

The previous prime is 180724591. The next prime is 180724627. The reversal of 180724621 is 126427081.

180724621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 180724621 - 2⁵ = 180724589 is a prime.

It is a super-2 number, since 2×180724621² = 65322777271187282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180724627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8781 + ... + 20941.

It is an arithmetic number, because the mean of its divisors is an integer number (14156568).

Almost surely, 2^180724621 is an apocalyptic number.

180724621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

180724621 is a deficient number, since it is larger than the sum of its proper divisors (45780467).

180724621 is a wasteful number, since it uses less digits than its factorization.

180724621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12372.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 180724621 is about 13443.3857714491. The cubic root of 180724621 is about 565.3782634190.

The spelling of 180724621 in words is "one hundred eighty million, seven hundred twenty-four thousand, six hundred twenty-one".