73211251481 has 4 divisors (see below), whose sum is σ = 73325110992. Its totient is φ = 73097391972.

The previous prime is 73211251457. The next prime is 73211251507. The reversal of 73211251481 is 18415211237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73211251481 is a prime.

It is a super-2 number, since 2×73211251481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73211251411) 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, 56928791 + ... + 56930076.

It is an arithmetic number, because the mean of its divisors is an integer number (18331277748).

Almost surely, 2^73211251481 is an apocalyptic number.

It is an amenable number.

73211251481 is a deficient number, since it is larger than the sum of its proper divisors (113859511).

73211251481 is a wasteful number, since it uses less digits than its factorization.

73211251481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113859510.

The product of its digits is 13440, while the sum is 35.

The spelling of 73211251481 in words is "seventy-three billion, two hundred eleven million, two hundred fifty-one thousand, four hundred eighty-one".