47920521 has 16 divisors (see below), whose sum is σ = 69900480. Its totient is φ = 28960320.

The previous prime is 47920511. The next prime is 47920541. The reversal of 47920521 is 12502974.

It is not a de Polignac number, because 47920521 - 2⁷ = 47920393 is a prime.

It is a super-2 number, since 2×47920521² = 4592752665822882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47920511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10971 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (4368780).

Almost surely, 2^47920521 is an apocalyptic number.

It is an amenable number.

47920521 is a deficient number, since it is larger than the sum of its proper divisors (21979959).

47920521 is a wasteful number, since it uses less digits than its factorization.

47920521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 47920521 is about 6922.4649511572. The cubic root of 47920521 is about 363.2234203533.

The spelling of 47920521 in words is "forty-seven million, nine hundred twenty thousand, five hundred twenty-one".