51970251 has 8 divisors (see below), whose sum is σ = 69344064. Its totient is φ = 34621640.

The previous prime is 51970249. The next prime is 51970307. The reversal of 51970251 is 15207915.

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 51970251 - 2¹ = 51970249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51970211) 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, 801 + ... + 10226.

It is an arithmetic number, because the mean of its divisors is an integer number (8668008).

Almost surely, 2^51970251 is an apocalyptic number.

51970251 is a deficient number, since it is larger than the sum of its proper divisors (17373813).

51970251 is a wasteful number, since it uses less digits than its factorization.

51970251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12601.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 51970251 is about 7209.0395338075. The cubic root of 51970251 is about 373.1799235945.

The spelling of 51970251 in words is "fifty-one million, nine hundred seventy thousand, two hundred fifty-one".