72105215071 has 8 divisors (see below), whose sum is σ = 72275942000. Its totient is φ = 71934594048.

The previous prime is 72105215069. The next prime is 72105215113. The reversal of 72105215071 is 17051250127.

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 72105215071 - 2¹ = 72105215069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72105215041) 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, 1430815 + ... + 1480351.

It is an arithmetic number, because the mean of its divisors is an integer number (9034492750).

Almost surely, 2^72105215071 is an apocalyptic number.

72105215071 is a deficient number, since it is larger than the sum of its proper divisors (170726929).

72105215071 is a wasteful number, since it uses less digits than its factorization.

72105215071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52953.

The product of its (nonzero) digits is 4900, while the sum is 31.

Adding to 72105215071 its reverse (17051250127), we get a palindrome (89156465198).

The spelling of 72105215071 in words is "seventy-two billion, one hundred five million, two hundred fifteen thousand, seventy-one".