651520625 has 40 divisors (see below), whose sum is σ = 938099712. Its totient is φ = 443088000.

The previous prime is 651520603. The next prime is 651520633. The reversal of 651520625 is 526025156.

651520625 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 651520625 - 2⁶ = 651520561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 651520591 and 651520600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 598832 + ... + 599918.

Almost surely, 2^651520625 is an apocalyptic number.

It is an amenable number.

651520625 is a deficient number, since it is larger than the sum of its proper divisors (286579087).

651520625 is a wasteful number, since it uses less digits than its factorization.

651520625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 651520625 is about 25524.9020566191. The cubic root of 651520625 is about 866.9140791821.

The spelling of 651520625 in words is "six hundred fifty-one million, five hundred twenty thousand, six hundred twenty-five".