47551531 has 2 divisors, whose sum is σ = 47551532. Its totient is φ = 47551530.

The previous prime is 47551523. The next prime is 47551541. The reversal of 47551531 is 13515574.

47551531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47551531 - 2³ = 47551523 is a prime.

It is a super-2 number, since 2×47551531² = 4522296200887922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47551493 and 47551502.

It is not a weakly prime, because it can be changed into another prime (47551541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23775765 + 23775766.

It is an arithmetic number, because the mean of its divisors is an integer number (23775766).

Almost surely, 2^47551531 is an apocalyptic number.

47551531 is a deficient number, since it is larger than the sum of its proper divisors (1).

47551531 is an equidigital number, since it uses as much as digits as its factorization.

47551531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 31.

The square root of 47551531 is about 6895.7618143320. The cubic root of 47551531 is about 362.2887387342.

The spelling of 47551531 in words is "forty-seven million, five hundred fifty-one thousand, five hundred thirty-one".