77525225 has 12 divisors (see below), whose sum is σ = 101191440. Its totient is φ = 58755600.

The previous prime is 77525221. The next prime is 77525257. The reversal of 77525225 is 52252577.

It is not a de Polignac number, because 77525225 - 2² = 77525221 is a prime.

It is a super-2 number, since 2×77525225² = 12020321022601250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77525221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81131 + ... + 82080.

It is an arithmetic number, because the mean of its divisors is an integer number (8432620).

Almost surely, 2^77525225 is an apocalyptic number.

It is an amenable number.

77525225 is a deficient number, since it is larger than the sum of its proper divisors (23666215).

77525225 is a wasteful number, since it uses less digits than its factorization.

77525225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163240 (or 163235 counting only the distinct ones).

The product of its digits is 49000, while the sum is 35.

The square root of 77525225 is about 8804.8409979965. The cubic root of 77525225 is about 426.3972009321.

The spelling of 77525225 in words is "seventy-seven million, five hundred twenty-five thousand, two hundred twenty-five".