52086991 has 12 divisors (see below), whose sum is σ = 57988000. Its totient is φ = 46743840.

The previous prime is 52086977. The next prime is 52087027. The reversal of 52086991 is 19968025.

It is not a de Polignac number, because 52086991 - 2²³ = 43698383 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52087991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6835 + ... + 12283.

Almost surely, 2^52086991 is an apocalyptic number.

52086991 is a deficient number, since it is larger than the sum of its proper divisors (5901009).

52086991 is a wasteful number, since it uses less digits than its factorization.

52086991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550 (or 5539 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 52086991 is about 7217.1317710016. The cubic root of 52086991 is about 373.4591374670.

The spelling of 52086991 in words is "fifty-two million, eighty-six thousand, nine hundred ninety-one".