52291993 has 8 divisors (see below), whose sum is σ = 56814408. Its totient is φ = 47841024.

The previous prime is 52291979. The next prime is 52292011. The reversal of 52291993 is 39919225.

It can be written as a sum of positive squares in 4 ways, for example, as 6215049 + 46076944 = 2493^2 + 6788^2 .

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 52291993 - 2⁵ = 52291961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52291793) 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, 16330 + ... + 19267.

It is an arithmetic number, because the mean of its divisors is an integer number (7101801).

Almost surely, 2^52291993 is an apocalyptic number.

It is an amenable number.

52291993 is a deficient number, since it is larger than the sum of its proper divisors (4522415).

52291993 is a wasteful number, since it uses less digits than its factorization.

52291993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35723.

The product of its digits is 43740, while the sum is 40.

The square root of 52291993 is about 7231.3202805573. The cubic root of 52291993 is about 373.9484448558.

The spelling of 52291993 in words is "fifty-two million, two hundred ninety-one thousand, nine hundred ninety-three".