47222621 has 4 divisors (see below), whose sum is σ = 47236992. Its totient is φ = 47208252.

The previous prime is 47222603. The next prime is 47222627. The reversal of 47222621 is 12622274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47222621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47222627) 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, 446 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (11809248).

Almost surely, 2^47222621 is an apocalyptic number.

It is an amenable number.

47222621 is a deficient number, since it is larger than the sum of its proper divisors (14371).

47222621 is an equidigital number, since it uses as much as digits as its factorization.

47222621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14370.

The product of its digits is 2688, while the sum is 26.

The square root of 47222621 is about 6871.8717246468. The cubic root of 47222621 is about 361.4514983198.

Adding to 47222621 its reverse (12622274), we get a palindrome (59844895).

The spelling of 47222621 in words is "forty-seven million, two hundred twenty-two thousand, six hundred twenty-one".