72143517 has 8 divisors (see below), whose sum is σ = 97350624. Its totient is φ = 47516048.

The previous prime is 72143507. The next prime is 72143527. The reversal of 72143517 is 71534127.

It is an interprime number because it is at equal distance from previous prime (72143507) and next prime (72143527).

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 72143517 - 2⁶ = 72143453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144618 + ... + 145115.

It is an arithmetic number, because the mean of its divisors is an integer number (12168828).

Almost surely, 2^72143517 is an apocalyptic number.

It is an amenable number.

72143517 is a deficient number, since it is larger than the sum of its proper divisors (25207107).

72143517 is a wasteful number, since it uses less digits than its factorization.

72143517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289819.

The product of its digits is 5880, while the sum is 30.

The square root of 72143517 is about 8493.7339845324. The cubic root of 72143517 is about 416.2929954054.

It can be divided in two parts, 7214 and 3517, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 72143517 in words is "seventy-two million, one hundred forty-three thousand, five hundred seventeen".