745217231 has 8 divisors (see below), whose sum is σ = 815532624. Its totient is φ = 675329920.

The previous prime is 745217201. The next prime is 745217261. The reversal of 745217231 is 132712547.

It is an interprime number because it is at equal distance from previous prime (745217201) and next prime (745217261).

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 745217231 - 2⁶ = 745217167 is a prime.

It is a super-2 number, since 2×745217231² = 1110697442758614722, 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 (745217201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103370 + ... + 110343.

It is an arithmetic number, because the mean of its divisors is an integer number (101941578).

Almost surely, 2^745217231 is an apocalyptic number.

745217231 is a deficient number, since it is larger than the sum of its proper divisors (70315393).

745217231 is a wasteful number, since it uses less digits than its factorization.

745217231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214041.

The product of its digits is 11760, while the sum is 32.

The square root of 745217231 is about 27298.6672018983. The cubic root of 745217231 is about 906.6248724757.

Adding to 745217231 its reverse (132712547), we get a palindrome (877929778).

The spelling of 745217231 in words is "seven hundred forty-five million, two hundred seventeen thousand, two hundred thirty-one".