47557491 has 16 divisors (see below), whose sum is σ = 67257600. Its totient is φ = 29826720.

The previous prime is 47557487. The next prime is 47557553. The reversal of 47557491 is 19475574.

It is a happy number.

It is not a de Polignac number, because 47557491 - 2² = 47557487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47557421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441 + ... + 9858.

It is an arithmetic number, because the mean of its divisors is an integer number (4203600).

Almost surely, 2^47557491 is an apocalyptic number.

47557491 is a deficient number, since it is larger than the sum of its proper divisors (19700109).

47557491 is a wasteful number, since it uses less digits than its factorization.

47557491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11386.

The product of its digits is 176400, while the sum is 42.

The square root of 47557491 is about 6896.1939502888. The cubic root of 47557491 is about 362.3038742488.

It can be divided in two parts, 475574 and 91, that multiplied together give a palindrome (43277234).

The spelling of 47557491 in words is "forty-seven million, five hundred fifty-seven thousand, four hundred ninety-one".