77224331 has 2 divisors, whose sum is σ = 77224332. Its totient is φ = 77224330.

The previous prime is 77224289. The next prime is 77224351. The reversal of 77224331 is 13342277.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77224331 is a prime.

It is a super-2 number, since 2×77224331² = 11927194596795122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77224294 and 77224303.

It is not a weakly prime, because it can be changed into another prime (77224351) 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 as a sum of consecutive naturals, namely, 38612165 + 38612166.

It is an arithmetic number, because the mean of its divisors is an integer number (38612166).

Almost surely, 2^77224331 is an apocalyptic number.

77224331 is a deficient number, since it is larger than the sum of its proper divisors (1).

77224331 is an equidigital number, since it uses as much as digits as its factorization.

77224331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 29.

The square root of 77224331 is about 8787.7375359076. The cubic root of 77224331 is about 425.8448357444.

The spelling of 77224331 in words is "seventy-seven million, two hundred twenty-four thousand, three hundred thirty-one".