47055831 has 4 divisors (see below), whose sum is σ = 62741112. Its totient is φ = 31370552.

The previous prime is 47055817. The next prime is 47055851. The reversal of 47055831 is 13855074.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47055831 - 2¹⁸ = 46793687 is a prime.

It is a super-2 number, since 2×47055831² = 4428502462201122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47055792 and 47055801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47055851) 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, 7842636 + ... + 7842641.

It is an arithmetic number, because the mean of its divisors is an integer number (15685278).

Almost surely, 2^47055831 is an apocalyptic number.

47055831 is a deficient number, since it is larger than the sum of its proper divisors (15685281).

47055831 is a wasteful number, since it uses less digits than its factorization.

47055831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15685280.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 47055831 is about 6859.7252860446. The cubic root of 47055831 is about 361.0254481847.

The spelling of 47055831 in words is "forty-seven million, fifty-five thousand, eight hundred thirty-one".