775220115 has 64 divisors (see below), whose sum is σ = 1317482496. Its totient is φ = 388749312.

The previous prime is 775220113. The next prime is 775220143. The reversal of 775220115 is 511022577.

It is not a de Polignac number, because 775220115 - 2¹ = 775220113 is a prime.

It is a super-2 number, since 2×775220115² = 1201932453401226450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (775220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2947474 + ... + 2947736.

It is an arithmetic number, because the mean of its divisors is an integer number (20585664).

Almost surely, 2^775220115 is an apocalyptic number.

775220115 is a deficient number, since it is larger than the sum of its proper divisors (542262381).

775220115 is a wasteful number, since it uses less digits than its factorization.

775220115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 775220115 is about 27842.7749155863. The cubic root of 775220115 is about 918.6322283210.

The spelling of 775220115 in words is "seven hundred seventy-five million, two hundred twenty thousand, one hundred fifteen".