51290259 has 4 divisors (see below), whose sum is σ = 68387016. Its totient is φ = 34193504.

The previous prime is 51290257. The next prime is 51290263. The reversal of 51290259 is 95209215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51290259 - 2¹ = 51290257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51290257) 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 3 ways as a sum of consecutive naturals, for example, 8548374 + ... + 8548379.

It is an arithmetic number, because the mean of its divisors is an integer number (17096754).

Almost surely, 2^51290259 is an apocalyptic number.

51290259 is a deficient number, since it is larger than the sum of its proper divisors (17096757).

51290259 is a wasteful number, since it uses less digits than its factorization.

51290259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17096756.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 51290259 is about 7161.7217901843. The cubic root of 51290259 is about 371.5451792022.

The spelling of 51290259 in words is "fifty-one million, two hundred ninety thousand, two hundred fifty-nine".