45320221731 has 4 divisors (see below), whose sum is σ = 60426962312. Its totient is φ = 30213481152.

The previous prime is 45320221697. The next prime is 45320221763. The reversal of 45320221731 is 13712202354.

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

It is not a de Polignac number, because 45320221731 - 2⁷ = 45320221603 is a prime.

It is a super-6 number, since 6×45320221731⁶ (a number of 65 digits) contains 666666 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45320221231) 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 3 ways as a sum of consecutive naturals, for example, 7553370286 + ... + 7553370291.

It is an arithmetic number, because the mean of its divisors is an integer number (15106740578).

Almost surely, 2^45320221731 is an apocalyptic number.

45320221731 is a deficient number, since it is larger than the sum of its proper divisors (15106740581).

45320221731 is a wasteful number, since it uses less digits than its factorization.

45320221731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15106740580.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 45320221731 in words is "forty-five billion, three hundred twenty million, two hundred twenty-one thousand, seven hundred thirty-one".