511220025 has 24 divisors (see below), whose sum is σ = 939131360. Its totient is φ = 272650320.

The previous prime is 511219993. The next prime is 511220027. The reversal of 511220025 is 520022115.

It is not a de Polignac number, because 511220025 - 2⁵ = 511219993 is a prime.

It is a super-2 number, since 2×511220025² = 522691827922001250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (511220027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378007 + ... + 379356.

Almost surely, 2^511220025 is an apocalyptic number.

It is an amenable number.

511220025 is a deficient number, since it is larger than the sum of its proper divisors (427911335).

511220025 is a wasteful number, since it uses less digits than its factorization.

511220025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757382 (or 757371 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 511220025 is about 22610.1752536330. The cubic root of 511220025 is about 799.5935565605.

The spelling of 511220025 in words is "five hundred eleven million, two hundred twenty thousand, twenty-five".