503778025 has 15 divisors (see below), whose sum is σ = 634149671. Its totient is φ = 397007160.

The previous prime is 503777999. The next prime is 503778031. The reversal of 503778025 is 520877305.

The square root of 503778025 is 22445.

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

It can be written as a sum of positive squares in only one way, i.e., 181360089 + 322417936 = 13467^2 + 17956^2 .

It is not a de Polignac number, because 503778025 - 2⁹ = 503777513 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, 7519042 + ... + 7519108.

Almost surely, 2^503778025 is an apocalyptic number.

503778025 is the 22445-th square number.

503778025 is the 11223-rd centered octagonal number.

It is an amenable number.

503778025 is a deficient number, since it is larger than the sum of its proper divisors (130371646).

503778025 is an frugal number, since it uses more digits than its factorization.

503778025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The cubic root of 503778025 is about 795.6945922506.

The spelling of 503778025 in words is "five hundred three million, seven hundred seventy-eight thousand, twenty-five".