52105991 has 8 divisors (see below), whose sum is σ = 59602944. Its totient is φ = 44622360.

The previous prime is 52105931. The next prime is 52105997. The reversal of 52105991 is 19950125.

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 52105991 - 2²² = 47911687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52105997) 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, 7346 + ... + 12576.

It is an arithmetic number, because the mean of its divisors is an integer number (7450368).

Almost surely, 2^52105991 is an apocalyptic number.

52105991 is a deficient number, since it is larger than the sum of its proper divisors (7496953).

52105991 is a wasteful number, since it uses less digits than its factorization.

52105991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 52105991 is about 7218.4479633783. The cubic root of 52105991 is about 373.5045413889.

The spelling of 52105991 in words is "fifty-two million, one hundred five thousand, nine hundred ninety-one".