52007991 has 64 divisors (see below), whose sum is σ = 88473600. Its totient is φ = 26522496.

The previous prime is 52007957. The next prime is 52008001. The reversal of 52007991 is 19970025.

52007991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52007991 - 2⁶ = 52007927 is a prime.

It is a super-2 number, since 2×52007991² = 5409662255712162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52002991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 658290 + ... + 658368.

It is an arithmetic number, because the mean of its divisors is an integer number (1382400).

Almost surely, 2^52007991 is an apocalyptic number.

52007991 is a deficient number, since it is larger than the sum of its proper divisors (36465609).

52007991 is a wasteful number, since it uses less digits than its factorization.

52007991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 52007991 is about 7211.6566058015. The cubic root of 52007991 is about 373.2702342516.

The spelling of 52007991 in words is "fifty-two million, seven thousand, nine hundred ninety-one".