47724621 has 16 divisors (see below), whose sum is σ = 73446528. Its totient is φ = 27000000.

The previous prime is 47724619. The next prime is 47724641. The reversal of 47724621 is 12642774.

It is not a de Polignac number, because 47724621 - 2¹ = 47724619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47724601) 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, 9130 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (4590408).

Almost surely, 2^47724621 is an apocalyptic number.

It is an amenable number.

47724621 is a deficient number, since it is larger than the sum of its proper divisors (25721907).

47724621 is a wasteful number, since it uses less digits than its factorization.

47724621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612.

The product of its digits is 18816, while the sum is 33.

The square root of 47724621 is about 6908.3008764819. The cubic root of 47724621 is about 362.7277896089.

The spelling of 47724621 in words is "forty-seven million, seven hundred twenty-four thousand, six hundred twenty-one".