77212825 has 24 divisors (see below), whose sum is σ = 97993728. Its totient is φ = 60338880.

The previous prime is 77212813. The next prime is 77212829. The reversal of 77212825 is 52821277.

It is not a de Polignac number, because 77212825 - 2⁹ = 77212313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77212829) 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, 263379 + ... + 263671.

It is an arithmetic number, because the mean of its divisors is an integer number (4083072).

Almost surely, 2^77212825 is an apocalyptic number.

It is an amenable number.

77212825 is a deficient number, since it is larger than the sum of its proper divisors (20780903).

77212825 is a wasteful number, since it uses less digits than its factorization.

77212825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 508 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 77212825 is about 8787.0828492737. The cubic root of 77212825 is about 425.8236851823.

The spelling of 77212825 in words is "seventy-seven million, two hundred twelve thousand, eight hundred twenty-five".