51970259 has 4 divisors (see below), whose sum is σ = 56694840. Its totient is φ = 47245680.

The previous prime is 51970249. The next prime is 51970307. The reversal of 51970259 is 95207915.

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 51970259 - 2²⁰ = 50921683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51970249) 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, 2362274 + ... + 2362295.

It is an arithmetic number, because the mean of its divisors is an integer number (14173710).

Almost surely, 2^51970259 is an apocalyptic number.

51970259 is a deficient number, since it is larger than the sum of its proper divisors (4724581).

51970259 is a wasteful number, since it uses less digits than its factorization.

51970259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724580.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 51970259 is about 7209.0400886665. The cubic root of 51970259 is about 373.1799427429.

The spelling of 51970259 in words is "fifty-one million, nine hundred seventy thousand, two hundred fifty-nine".