72303155 has 16 divisors (see below), whose sum is σ = 89631360. Its totient is φ = 55959552.

The previous prime is 72303109. The next prime is 72303169. The reversal of 72303155 is 55130327.

It is a cyclic number.

It is not a de Polignac number, because 72303155 - 2¹⁶ = 72237619 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19187 + ... + 22643.

It is an arithmetic number, because the mean of its divisors is an integer number (5601960).

Almost surely, 2^72303155 is an apocalyptic number.

72303155 is a deficient number, since it is larger than the sum of its proper divisors (17328205).

72303155 is a wasteful number, since it uses less digits than its factorization.

72303155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 72303155 is about 8503.1261898198. The cubic root of 72303155 is about 416.5998246555.

The spelling of 72303155 in words is "seventy-two million, three hundred three thousand, one hundred fifty-five".