651525625 has 15 divisors (see below), whose sum is σ = 814944603. Its totient is φ = 520710000.

The previous prime is 651525619. The next prime is 651525631. The reversal of 651525625 is 526525156.

The square root of 651525625 is 25525.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (651525619) and next prime (651525631).

It can be written as a sum of positive squares in 7 ways, for example, as 453391849 + 198133776 = 21293^2 + 14076^2 .

It is not a de Polignac number, because 651525625 - 2¹¹ = 651523577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 637615 + ... + 638635.

Almost surely, 2^651525625 is an apocalyptic number.

651525625 is the 25525-th square number.

651525625 is the 12763-rd centered octagonal number.

It is an amenable number.

651525625 is a deficient number, since it is larger than the sum of its proper divisors (163418978).

651525625 is an frugal number, since it uses more digits than its factorization.

651525625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 1026 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The cubic root of 651525625 is about 866.9162968450.

Multiplying 651525625 by its product of digits (90000), we get a square (58637306250000 = 7657500²).

The spelling of 651525625 in words is "six hundred fifty-one million, five hundred twenty-five thousand, six hundred twenty-five".