47531507 has 4 divisors (see below), whose sum is σ = 50327496. Its totient is φ = 44735520.

The previous prime is 47531489. The next prime is 47531531. The reversal of 47531507 is 70513574.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70513574 = 2 ⋅35256787.

It is a cyclic number.

It is not a de Polignac number, because 47531507 - 2⁶ = 47531443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47531537) 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, 1397969 + ... + 1398002.

It is an arithmetic number, because the mean of its divisors is an integer number (12581874).

Almost surely, 2^47531507 is an apocalyptic number.

47531507 is a deficient number, since it is larger than the sum of its proper divisors (2795989).

47531507 is a wasteful number, since it uses less digits than its factorization.

47531507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795988.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 47531507 is about 6894.3097551532. The cubic root of 47531507 is about 362.2378782040.

The spelling of 47531507 in words is "forty-seven million, five hundred thirty-one thousand, five hundred seven".