47525551 has 4 divisors (see below), whose sum is σ = 48098232. Its totient is φ = 46952872.

The previous prime is 47525477. The next prime is 47525563. The reversal of 47525551 is 15552574.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15552574 = 2 ⋅7776287.

It is a cyclic number.

It is not a de Polignac number, because 47525551 - 2¹⁹ = 47001263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47526551) 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, 286216 + ... + 286381.

It is an arithmetic number, because the mean of its divisors is an integer number (12024558).

Almost surely, 2^47525551 is an apocalyptic number.

47525551 is a deficient number, since it is larger than the sum of its proper divisors (572681).

47525551 is an equidigital number, since it uses as much as digits as its factorization.

47525551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572680.

The product of its digits is 35000, while the sum is 34.

The square root of 47525551 is about 6893.8777912000. The cubic root of 47525551 is about 362.2227473357. Note that the first 3 decimals are identical.

The spelling of 47525551 in words is "forty-seven million, five hundred twenty-five thousand, five hundred fifty-one".