72154218 has 16 divisors (see below), whose sum is σ = 148209120. Its totient is φ = 23401296.

The previous prime is 72154213. The next prime is 72154231. The reversal of 72154218 is 81245127.

It is not an unprimeable number, because it can be changed into a prime (72154211) 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, 162288 + ... + 162731.

It is an arithmetic number, because the mean of its divisors is an integer number (9263070).

Almost surely, 2^72154218 is an apocalyptic number.

72154218 is an abundant number, since it is smaller than the sum of its proper divisors (76054902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72154218 is a wasteful number, since it uses less digits than its factorization.

72154218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325061.

The product of its digits is 4480, while the sum is 30.

The square root of 72154218 is about 8494.3638961372. The cubic root of 72154218 is about 416.3135772091.

Subtracting 72154218 from its reverse (81245127), we obtain a palindrome (9090909).

It can be divided in two parts, 72 and 154218, that added together give a triangular number (154290 = T₅₅₅).

The spelling of 72154218 in words is "seventy-two million, one hundred fifty-four thousand, two hundred eighteen".