47521631 has 4 divisors (see below), whose sum is σ = 47747064. Its totient is φ = 47296200.

The previous prime is 47521619. The next prime is 47521637. The reversal of 47521631 is 13612574.

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 47521631 - 2¹⁰ = 47520607 is a prime.

It is a super-2 number, since 2×47521631² = 4516610825800322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47521594 and 47521603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47521637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112400 + ... + 112821.

It is an arithmetic number, because the mean of its divisors is an integer number (11936766).

Almost surely, 2^47521631 is an apocalyptic number.

47521631 is a deficient number, since it is larger than the sum of its proper divisors (225433).

47521631 is a wasteful number, since it uses less digits than its factorization.

47521631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225432.

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

The square root of 47521631 is about 6893.5934751043. The cubic root of 47521631 is about 362.2127881160.

The spelling of 47521631 in words is "forty-seven million, five hundred twenty-one thousand, six hundred thirty-one".