77225955 has 32 divisors (see below), whose sum is σ = 125928000. Its totient is φ = 40407552.

The previous prime is 77225933. The next prime is 77225959. The reversal of 77225955 is 55952277.

It is a happy number.

It is not a de Polignac number, because 77225955 - 2²⁰ = 76177379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77225959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243457 + ... + 243773.

It is an arithmetic number, because the mean of its divisors is an integer number (3935250).

Almost surely, 2^77225955 is an apocalyptic number.

77225955 is a deficient number, since it is larger than the sum of its proper divisors (48702045).

77225955 is a wasteful number, since it uses less digits than its factorization.

77225955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583.

The product of its digits is 220500, while the sum is 42.

The square root of 77225955 is about 8787.8299369071. The cubic root of 77225955 is about 425.8478208449.

The spelling of 77225955 in words is "seventy-seven million, two hundred twenty-five thousand, nine hundred fifty-five".