47221451 has 4 divisors (see below), whose sum is σ = 47361912. Its totient is φ = 47080992.

The previous prime is 47221429. The next prime is 47221459. The reversal of 47221451 is 15412274.

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 47221451 - 2²² = 43027147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47221451.

It is not an unprimeable number, because it can be changed into a prime (47221459) 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, 69725 + ... + 70398.

It is an arithmetic number, because the mean of its divisors is an integer number (11840478).

Almost surely, 2^47221451 is an apocalyptic number.

47221451 is a deficient number, since it is larger than the sum of its proper divisors (140461).

47221451 is a wasteful number, since it uses less digits than its factorization.

47221451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140460.

The product of its digits is 2240, while the sum is 26.

The square root of 47221451 is about 6871.7865944745. The cubic root of 47221451 is about 361.4485131563.

The spelling of 47221451 in words is "forty-seven million, two hundred twenty-one thousand, four hundred fifty-one".