47520257 has 4 divisors (see below), whose sum is σ = 47565780. Its totient is φ = 47474736.

The previous prime is 47520251. The next prime is 47520307. The reversal of 47520257 is 75202574.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14984641 + 32535616 = 3871^2 + 5704^2 .

It is a cyclic number.

It is not a de Polignac number, because 47520257 - 2²⁰ = 46471681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47520251) 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, 21158 + ... + 23295.

It is an arithmetic number, because the mean of its divisors is an integer number (11891445).

Almost surely, 2^47520257 is an apocalyptic number.

It is an amenable number.

47520257 is a deficient number, since it is larger than the sum of its proper divisors (45523).

47520257 is a wasteful number, since it uses less digits than its factorization.

47520257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45522.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 47520257 is about 6893.4938166361. The cubic root of 47520257 is about 362.2092971782.

The spelling of 47520257 in words is "forty-seven million, five hundred twenty thousand, two hundred fifty-seven".