47821572 has 36 divisors (see below), whose sum is σ = 121666636. Its totient is φ = 15837120.

The previous prime is 47821567. The next prime is 47821573. The reversal of 47821572 is 27512874.

47821572 is a `hidden beast` number, since 4 + 7 + 82 + 1 + 572 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 20196036 = 5256^2 + 4494^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (47821573) 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, 1422 + ... + 9882.

Almost surely, 2^47821572 is an apocalyptic number.

It is an amenable number.

47821572 is an abundant number, since it is smaller than the sum of its proper divisors (73845064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47821572 is a wasteful number, since it uses less digits than its factorization.

47821572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628 (or 8623 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 47821572 is about 6915.3143095596. The cubic root of 47821572 is about 362.9732466680.

The spelling of 47821572 in words is "forty-seven million, eight hundred twenty-one thousand, five hundred seventy-two".