47811451 has 4 divisors (see below), whose sum is σ = 47854072. Its totient is φ = 47768832.

The previous prime is 47811443. The next prime is 47811461. The reversal of 47811451 is 15411874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15411874 = 2 ⋅7705937.

It is a cyclic number.

It is not a de Polignac number, because 47811451 - 2³ = 47811443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47811431) 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, 19581 + ... + 21886.

It is an arithmetic number, because the mean of its divisors is an integer number (11963518).

Almost surely, 2^47811451 is an apocalyptic number.

47811451 is a deficient number, since it is larger than the sum of its proper divisors (42621).

47811451 is a wasteful number, since it uses less digits than its factorization.

47811451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42620.

The product of its digits is 4480, while the sum is 31.

The square root of 47811451 is about 6914.5824892035. The cubic root of 47811451 is about 362.9476382011.

The spelling of 47811451 in words is "forty-seven million, eight hundred eleven thousand, four hundred fifty-one".