47151921 has 8 divisors (see below), whose sum is σ = 62929984. Its totient is φ = 31404240.

The previous prime is 47151919. The next prime is 47151953. The reversal of 47151921 is 12915174.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47151921 - 2¹ = 47151919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47151911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685 + ... + 10386.

It is an arithmetic number, because the mean of its divisors is an integer number (7866248).

Almost surely, 2^47151921 is an apocalyptic number.

It is an amenable number.

47151921 is a deficient number, since it is larger than the sum of its proper divisors (15778063).

47151921 is a wasteful number, since it uses less digits than its factorization.

47151921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15191.

The product of its digits is 2520, while the sum is 30.

The square root of 47151921 is about 6866.7256389053. The cubic root of 47151921 is about 361.2710241872.

The spelling of 47151921 in words is "forty-seven million, one hundred fifty-one thousand, nine hundred twenty-one".