52263991 has 4 divisors (see below), whose sum is σ = 56284312. Its totient is φ = 48243672.

The previous prime is 52263977. The next prime is 52264019. The reversal of 52263991 is 19936225.

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 52263991 - 2⁷ = 52263863 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 52263991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52263901) 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, 2010141 + ... + 2010166.

It is an arithmetic number, because the mean of its divisors is an integer number (14071078).

Almost surely, 2^52263991 is an apocalyptic number.

52263991 is a deficient number, since it is larger than the sum of its proper divisors (4020321).

52263991 is a wasteful number, since it uses less digits than its factorization.

52263991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020320.

The product of its digits is 29160, while the sum is 37.

The square root of 52263991 is about 7229.3838603300. The cubic root of 52263991 is about 373.8816840038.

The spelling of 52263991 in words is "fifty-two million, two hundred sixty-three thousand, nine hundred ninety-one".