765256133 has 4 divisors (see below), whose sum is σ = 765475788. Its totient is φ = 765036480.

The previous prime is 765256127. The next prime is 765256171. The reversal of 765256133 is 331652567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331652567 = 41 ⋅8089087.

It can be written as a sum of positive squares in 2 ways, for example, as 183819364 + 581436769 = 13558^2 + 24113^2 .

It is a cyclic number.

It is not a de Polignac number, because 765256133 - 2⁴ = 765256117 is a prime.

It is a super-2 number, since 2×765256133² = 1171233898188227378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765256733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104516 + ... + 111597.

It is an arithmetic number, because the mean of its divisors is an integer number (191368947).

Almost surely, 2^765256133 is an apocalyptic number.

It is an amenable number.

765256133 is a deficient number, since it is larger than the sum of its proper divisors (219655).

765256133 is a wasteful number, since it uses less digits than its factorization.

765256133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219654.

The product of its digits is 113400, while the sum is 38.

The square root of 765256133 is about 27663.2632384540. The cubic root of 765256133 is about 914.6794872121.

The spelling of 765256133 in words is "seven hundred sixty-five million, two hundred fifty-six thousand, one hundred thirty-three".