651725251 has 8 divisors (see below), whose sum is σ = 686765520. Its totient is φ = 616758912.

The previous prime is 651725237. The next prime is 651725257. The reversal of 651725251 is 152527156.

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 651725251 - 2⁵ = 651725219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651725257) 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, 111 + ... + 36103.

It is an arithmetic number, because the mean of its divisors is an integer number (85845690).

Almost surely, 2^651725251 is an apocalyptic number.

651725251 is a deficient number, since it is larger than the sum of its proper divisors (35040269).

651725251 is a wasteful number, since it uses less digits than its factorization.

651725251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36965.

The product of its digits is 21000, while the sum is 34.

The square root of 651725251 is about 25528.9101020784. The cubic root of 651725251 is about 867.0048282110.

The spelling of 651725251 in words is "six hundred fifty-one million, seven hundred twenty-five thousand, two hundred fifty-one".