47722121 has 4 divisors (see below), whose sum is σ = 48086544. Its totient is φ = 47357700.

The previous prime is 47722109. The next prime is 47722141. The reversal of 47722121 is 12122774.

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.

It is a cyclic number.

It is not a de Polignac number, because 47722121 - 2¹⁴ = 47705737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47722141) 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, 182015 + ... + 182276.

It is an arithmetic number, because the mean of its divisors is an integer number (12021636).

Almost surely, 2^47722121 is an apocalyptic number.

It is an amenable number.

47722121 is a deficient number, since it is larger than the sum of its proper divisors (364423).

47722121 is a wasteful number, since it uses less digits than its factorization.

47722121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364422.

The product of its digits is 1568, while the sum is 26.

The square root of 47722121 is about 6908.1199323694. The cubic root of 47722121 is about 362.7214558040.

Adding to 47722121 its reverse (12122774), we get a palindrome (59844895).

The spelling of 47722121 in words is "forty-seven million, seven hundred twenty-two thousand, one hundred twenty-one".