77255331 has 4 divisors (see below), whose sum is σ = 103007112. Its totient is φ = 51503552.

The previous prime is 77255303. The next prime is 77255351. The reversal of 77255331 is 13355277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77255331 - 2¹⁹ = 76731043 is a prime.

It is a super-2 number, since 2×77255331² = 11936772335839122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77255292 and 77255301.

It is not an unprimeable number, because it can be changed into a prime (77255351) 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 3 ways as a sum of consecutive naturals, for example, 12875886 + ... + 12875891.

It is an arithmetic number, because the mean of its divisors is an integer number (25751778).

Almost surely, 2^77255331 is an apocalyptic number.

77255331 is a deficient number, since it is larger than the sum of its proper divisors (25751781).

77255331 is a wasteful number, since it uses less digits than its factorization.

77255331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25751780.

The product of its digits is 22050, while the sum is 33.

The square root of 77255331 is about 8789.5011803856. The cubic root of 77255331 is about 425.9018101189.

The spelling of 77255331 in words is "seventy-seven million, two hundred fifty-five thousand, three hundred thirty-one".