755231621 has 8 divisors (see below), whose sum is σ = 764053080. Its totient is φ = 746431488.

The previous prime is 755231567. The next prime is 755231623. The reversal of 755231621 is 126132557.

755231621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 57532225 + 697699396 = 7585^2 + 26414^2 .

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 755231621 - 2¹⁸ = 754969477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755231623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72425 + ... + 82193.

It is an arithmetic number, because the mean of its divisors is an integer number (95506635).

Almost surely, 2^755231621 is an apocalyptic number.

It is an amenable number.

755231621 is a deficient number, since it is larger than the sum of its proper divisors (8821459).

755231621 is an equidigital number, since it uses as much as digits as its factorization.

755231621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10663.

The product of its digits is 12600, while the sum is 32.

The square root of 755231621 is about 27481.4777804979. The cubic root of 755231621 is about 910.6679558312.

The spelling of 755231621 in words is "seven hundred fifty-five million, two hundred thirty-one thousand, six hundred twenty-one".