742247231 has 24 divisors (see below), whose sum is σ = 838866672. Its totient is φ = 651276800.

The previous prime is 742247221. The next prime is 742247263. The reversal of 742247231 is 132742247.

It is a de Polignac number, because none of the positive numbers 2^k-742247231 is a prime.

It is a super-2 number, since 2×742247231² = 1101861903854334722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742247221) 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 23 ways as a sum of consecutive naturals, for example, 2533121 + ... + 2533413.

It is an arithmetic number, because the mean of its divisors is an integer number (34952778).

Almost surely, 2^742247231 is an apocalyptic number.

742247231 is a deficient number, since it is larger than the sum of its proper divisors (96619441).

742247231 is a wasteful number, since it uses less digits than its factorization.

742247231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 482 counting only the distinct ones).

The product of its digits is 18816, while the sum is 32.

The square root of 742247231 is about 27244.2146335695. The cubic root of 742247231 is about 905.4188433949.

Adding to 742247231 its reverse (132742247), we get a palindrome (874989478).

The spelling of 742247231 in words is "seven hundred forty-two million, two hundred forty-seven thousand, two hundred thirty-one".