47542509 has 24 divisors (see below), whose sum is σ = 78766272. Its totient is φ = 27069120.

The previous prime is 47542487. The next prime is 47542511. The reversal of 47542509 is 90524574.

It is not a de Polignac number, because 47542509 - 2¹¹ = 47540461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47542529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18514 + ... + 20924.

It is an arithmetic number, because the mean of its divisors is an integer number (3281928).

Almost surely, 2^47542509 is an apocalyptic number.

It is an amenable number.

47542509 is a deficient number, since it is larger than the sum of its proper divisors (31223763).

47542509 is a wasteful number, since it uses less digits than its factorization.

47542509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 47542509 is about 6895.1076133734. The cubic root of 47542509 is about 362.2658248155.

The spelling of 47542509 in words is "forty-seven million, five hundred forty-two thousand, five hundred nine".