77853225 has 12 divisors (see below), whose sum is σ = 128717456. Its totient is φ = 41521680.

The previous prime is 77853221. The next prime is 77853233. The reversal of 77853225 is 52235877.

It is not a de Polignac number, because 77853225 - 2² = 77853221 is a prime.

It is a super-2 number, since 2×77853225² = 12122249285801250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77853221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518947 + ... + 519096.

Almost surely, 2^77853225 is an apocalyptic number.

77853225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77853225 is a deficient number, since it is larger than the sum of its proper divisors (50864231).

77853225 is a wasteful number, since it uses less digits than its factorization.

77853225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038056 (or 1038051 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 77853225 is about 8823.4474555017. The cubic root of 77853225 is about 426.9977001158.

The spelling of 77853225 in words is "seventy-seven million, eight hundred fifty-three thousand, two hundred twenty-five".