742531302310321 has 4 divisors (see below), whose sum is σ = 742531408393572. Its totient is φ = 742531196227072.

The previous prime is 742531302310297. The next prime is 742531302310331. The reversal of 742531302310321 is 123013203135247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176658124038400 + 565873178271921 = 13291280^2 + 23788089^2 .

It is a cyclic number.

It is not a de Polignac number, because 742531302310321 - 2¹³ = 742531302302129 is a prime.

It is a super-2 number, since 2×742531302310321² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742531302310331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41739616 + ... + 56808961.

It is an arithmetic number, because the mean of its divisors is an integer number (185632852098393).

Almost surely, 2^{742531302310321} is an apocalyptic number.

It is an amenable number.

742531302310321 is a deficient number, since it is larger than the sum of its proper divisors (106083251).

742531302310321 is an equidigital number, since it uses as much as digits as its factorization.

742531302310321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106083250.

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 742531302310321 its reverse (123013203135247), we get a palindrome (865544505445568).

The spelling of 742531302310321 in words is "seven hundred forty-two trillion, five hundred thirty-one billion, three hundred two million, three hundred ten thousand, three hundred twenty-one".