51025825 has 6 divisors (see below), whose sum is σ = 63272054. Its totient is φ = 40820640.

The previous prime is 51025813. The next prime is 51025837. The reversal of 51025825 is 52852015.

It is an interprime number because it is at equal distance from previous prime (51025813) and next prime (51025837).

It can be written as a sum of positive squares in 3 ways, for example, as 16908544 + 34117281 = 4112^2 + 5841^2 .

It is not a de Polignac number, because 51025825 - 2¹⁵ = 50993057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51025793 and 51025802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1020492 + ... + 1020541.

Almost surely, 2^51025825 is an apocalyptic number.

It is an amenable number.

51025825 is a deficient number, since it is larger than the sum of its proper divisors (12246229).

51025825 is a wasteful number, since it uses less digits than its factorization.

51025825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041043 (or 2041038 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 51025825 is about 7143.2363113648. The cubic root of 51025825 is about 370.9055612653.

It can be divided in two parts, 510 and 25825, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 51025825 in words is "fifty-one million, twenty-five thousand, eight hundred twenty-five".