51172089 has 4 divisors (see below), whose sum is σ = 68229456. Its totient is φ = 34114724.

The previous prime is 51172087. The next prime is 51172097. The reversal of 51172089 is 98027115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51172089 - 2¹ = 51172087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51172087) 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, 8528679 + ... + 8528684.

It is an arithmetic number, because the mean of its divisors is an integer number (17057364).

Almost surely, 2^51172089 is an apocalyptic number.

It is an amenable number.

51172089 is a deficient number, since it is larger than the sum of its proper divisors (17057367).

51172089 is a wasteful number, since it uses less digits than its factorization.

51172089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17057366.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 51172089 is about 7153.4669217101. The cubic root of 51172089 is about 371.2596197442.

The spelling of 51172089 in words is "fifty-one million, one hundred seventy-two thousand, eighty-nine".