51616091 has 8 divisors (see below), whose sum is σ = 52604160. Its totient is φ = 50631912.

The previous prime is 51616079. The next prime is 51616093. The reversal of 51616091 is 19061615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51616091 - 2¹⁴ = 51599707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51616093) 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, 48026 + ... + 49088.

It is an arithmetic number, because the mean of its divisors is an integer number (6575520).

Almost surely, 2^51616091 is an apocalyptic number.

51616091 is a deficient number, since it is larger than the sum of its proper divisors (988069).

51616091 is a wasteful number, since it uses less digits than its factorization.

51616091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 51616091 is about 7184.4339373398. The cubic root of 51616091 is about 372.3302915961.

The spelling of 51616091 in words is "fifty-one million, six hundred sixteen thousand, ninety-one".