48051991 has 8 divisors (see below), whose sum is σ = 53998560. Its totient is φ = 42426912.

The previous prime is 48051967. The next prime is 48052051. The reversal of 48051991 is 19915084.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 48051991 - 2²³ = 39663383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 48051991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48051191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80056 + ... + 80653.

It is an arithmetic number, because the mean of its divisors is an integer number (6749820).

Almost surely, 2^48051991 is an apocalyptic number.

48051991 is a deficient number, since it is larger than the sum of its proper divisors (5946569).

48051991 is a wasteful number, since it uses less digits than its factorization.

48051991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160745.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 48051991 is about 6931.9543420308. The cubic root of 48051991 is about 363.5552849936. Note that the first 3 decimals are identical.

The spelling of 48051991 in words is "forty-eight million, fifty-one thousand, nine hundred ninety-one".