47621531 has 4 divisors (see below), whose sum is σ = 47715600. Its totient is φ = 47527464.

The previous prime is 47621521. The next prime is 47621551. The reversal of 47621531 is 13512674.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47621531 - 2²² = 43427227 is a prime.

It is a super-3 number, since 3×47621531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47621494 and 47621503.

It is not an unprimeable number, because it can be changed into a prime (47621521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46271 + ... + 47288.

It is an arithmetic number, because the mean of its divisors is an integer number (11928900).

Almost surely, 2^47621531 is an apocalyptic number.

47621531 is a deficient number, since it is larger than the sum of its proper divisors (94069).

47621531 is an equidigital number, since it uses as much as digits as its factorization.

47621531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94068.

The product of its digits is 5040, while the sum is 29.

The square root of 47621531 is about 6900.8355291225. The cubic root of 47621531 is about 362.4664251107.

The spelling of 47621531 in words is "forty-seven million, six hundred twenty-one thousand, five hundred thirty-one".