775216031 has 8 divisors (see below), whose sum is σ = 826255584. Its totient is φ = 724780800.

The previous prime is 775216027. The next prime is 775216037. The reversal of 775216031 is 130612577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 775216031 - 2² = 775216027 is a prime.

It is a super-2 number, since 2×775216031² = 1201919789438785922, 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 (775216037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148430 + ... + 153563.

It is an arithmetic number, because the mean of its divisors is an integer number (103281948).

Almost surely, 2^775216031 is an apocalyptic number.

775216031 is a deficient number, since it is larger than the sum of its proper divisors (51039553).

775216031 is a wasteful number, since it uses less digits than its factorization.

775216031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302161.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 775216031 is about 27842.7015750986. The cubic root of 775216031 is about 918.6306151445.

The spelling of 775216031 in words is "seven hundred seventy-five million, two hundred sixteen thousand, thirty-one".