72305265822031 has 4 divisors (see below), whose sum is σ = 78878471805864. Its totient is φ = 65732059838200.

The previous prime is 72305265821953. The next prime is 72305265822061. The reversal of 72305265822031 is 13022856250327.

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

It is a cyclic number.

It is not a de Polignac number, because 72305265822031 - 2²⁵ = 72305232267599 is a prime.

It is a super-2 number, since 2×72305265822031² (a number of 29 digits) 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 (72305265822061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286602991900 + ... + 3286602991921.

It is an arithmetic number, because the mean of its divisors is an integer number (19719617951466).

Almost surely, 2^{72305265822031} is an apocalyptic number.

72305265822031 is a deficient number, since it is larger than the sum of its proper divisors (6573205983833).

72305265822031 is a wasteful number, since it uses less digits than its factorization.

72305265822031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6573205983832.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 72305265822031 in words is "seventy-two trillion, three hundred five billion, two hundred sixty-five million, eight hundred twenty-two thousand, thirty-one".