72273015 has 24 divisors (see below), whose sum is σ = 130721760. Its totient is φ = 36869184.

The previous prime is 72273013. The next prime is 72273023. The reversal of 72273015 is 51037227.

It is not a de Polignac number, because 72273015 - 2¹ = 72273013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72273015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72273013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33880 + ... + 35949.

It is an arithmetic number, because the mean of its divisors is an integer number (5446740).

Almost surely, 2^72273015 is an apocalyptic number.

72273015 is a deficient number, since it is larger than the sum of its proper divisors (58448745).

72273015 is a wasteful number, since it uses less digits than its factorization.

72273015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69863 (or 69860 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 72273015 is about 8501.3537157326. The cubic root of 72273015 is about 416.5419292389.

It can be divided in two parts, 722 and 73015, that added together give a palindrome (73737).

The spelling of 72273015 in words is "seventy-two million, two hundred seventy-three thousand, fifteen".