47552509 has 4 divisors (see below), whose sum is σ = 47622816. Its totient is φ = 47482204.

The previous prime is 47552507. The next prime is 47552521. The reversal of 47552509 is 90525574.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90525574 = 2 ⋅45262787.

It is a cyclic number.

It is not a de Polignac number, because 47552509 - 2¹ = 47552507 is a prime.

It is a super-2 number, since 2×47552509² = 4522482224390162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47552507) 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, 34129 + ... + 35494.

It is an arithmetic number, because the mean of its divisors is an integer number (11905704).

Almost surely, 2^47552509 is an apocalyptic number.

It is an amenable number.

47552509 is a deficient number, since it is larger than the sum of its proper divisors (70307).

47552509 is an equidigital number, since it uses as much as digits as its factorization.

47552509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70306.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 47552509 is about 6895.8327270896. The cubic root of 47552509 is about 362.2912224674.

The spelling of 47552509 in words is "forty-seven million, five hundred fifty-two thousand, five hundred nine".