772865331 has 16 divisors (see below), whose sum is σ = 1180372224. Its totient is φ = 440635104.

The previous prime is 772865221. The next prime is 772865347. The reversal of 772865331 is 133568277.

It is not a de Polignac number, because 772865331 - 2¹⁰ = 772864307 is a prime.

It is a super-2 number, since 2×772865331² = 1194641639723479122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (772860331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32236 + ... + 50841.

It is an arithmetic number, because the mean of its divisors is an integer number (73773264).

Almost surely, 2^772865331 is an apocalyptic number.

772865331 is a deficient number, since it is larger than the sum of its proper divisors (407506893).

772865331 is a wasteful number, since it uses less digits than its factorization.

772865331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83530.

The product of its digits is 211680, while the sum is 42.

The square root of 772865331 is about 27800.4555897920. The cubic root of 772865331 is about 917.7011489177.

The spelling of 772865331 in words is "seven hundred seventy-two million, eight hundred sixty-five thousand, three hundred thirty-one".