51025091 has 8 divisors (see below), whose sum is σ = 55110720. Its totient is φ = 46962432.

The previous prime is 51025087. The next prime is 51025129. The reversal of 51025091 is 19052015.

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 51025091 - 2² = 51025087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51025021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (6888840).

Almost surely, 2^51025091 is an apocalyptic number.

51025091 is a deficient number, since it is larger than the sum of its proper divisors (4085629).

51025091 is a wasteful number, since it uses less digits than its factorization.

51025091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11485.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 51025091 is about 7143.1849339073. The cubic root of 51025091 is about 370.9037827804.

The spelling of 51025091 in words is "fifty-one million, twenty-five thousand, ninety-one".