73212115513 has 8 divisors (see below), whose sum is σ = 73765576640. Its totient is φ = 72659036880.

The previous prime is 73212115507. The next prime is 73212115517. The reversal of 73212115513 is 31551121237.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73212115513 - 2²⁵ = 73178561081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73212115517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294628 + ... + 482938.

It is an arithmetic number, because the mean of its divisors is an integer number (9220697080).

Almost surely, 2^73212115513 is an apocalyptic number.

It is an amenable number.

73212115513 is a deficient number, since it is larger than the sum of its proper divisors (553461127).

73212115513 is a wasteful number, since it uses less digits than its factorization.

73212115513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191247.

The product of its digits is 6300, while the sum is 31.

The spelling of 73212115513 in words is "seventy-three billion, two hundred twelve million, one hundred fifteen thousand, five hundred thirteen".