47131551 has 12 divisors (see below), whose sum is σ = 70600712. Its totient is φ = 31420872.

The previous prime is 47131547. The next prime is 47131559. The reversal of 47131551 is 15513174.

It is not a de Polignac number, because 47131551 - 2² = 47131547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47131559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96736 + ... + 97221.

Almost surely, 2^47131551 is an apocalyptic number.

47131551 is a deficient number, since it is larger than the sum of its proper divisors (23469161).

47131551 is an equidigital number, since it uses as much as digits as its factorization.

47131551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193972 (or 193960 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 47131551 is about 6865.2422389891. The cubic root of 47131551 is about 361.2189927210.

The spelling of 47131551 in words is "forty-seven million, one hundred thirty-one thousand, five hundred fifty-one".