77210051 has 2 divisors, whose sum is σ = 77210052. Its totient is φ = 77210050.

The previous prime is 77210047. The next prime is 77210059. The reversal of 77210051 is 15001277.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77210051 - 2² = 77210047 is a prime.

It is a super-2 number, since 2×77210051² = 11922783950845202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 77209999 and 77210026.

It is not a weakly prime, because it can be changed into another prime (77210059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38605025 + 38605026.

It is an arithmetic number, because the mean of its divisors is an integer number (38605026).

Almost surely, 2^77210051 is an apocalyptic number.

77210051 is a deficient number, since it is larger than the sum of its proper divisors (1).

77210051 is an equidigital number, since it uses as much as digits as its factorization.

77210051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 77210051 is about 8786.9250025251. The cubic root of 77210051 is about 425.8185856449.

The spelling of 77210051 in words is "seventy-seven million, two hundred ten thousand, fifty-one".