745023331 has 16 divisors (see below), whose sum is σ = 813260448. Its totient is φ = 678412800.

The previous prime is 745023329. The next prime is 745023343. The reversal of 745023331 is 133320547.

It is not a de Polignac number, because 745023331 - 2¹ = 745023329 is a prime.

It is a super-2 number, since 2×745023331² = 1110119527468671122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745023331.

It is not an unprimeable number, because it can be changed into a prime (745023371) 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, 307035 + ... + 309451.

It is an arithmetic number, because the mean of its divisors is an integer number (50828778).

Almost surely, 2^745023331 is an apocalyptic number.

745023331 is a deficient number, since it is larger than the sum of its proper divisors (68237117).

745023331 is a wasteful number, since it uses less digits than its factorization.

745023331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 745023331 is about 27295.1155154178. The cubic root of 745023331 is about 906.5462332976.

Adding to 745023331 its reverse (133320547), we get a palindrome (878343878).

The spelling of 745023331 in words is "seven hundred forty-five million, twenty-three thousand, three hundred thirty-one".