72218901 has 16 divisors (see below), whose sum is σ = 97879104. Its totient is φ = 47359104.

The previous prime is 72218899. The next prime is 72218911. The reversal of 72218901 is 10981227.

It is not a de Polignac number, because 72218901 - 2¹ = 72218899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72218911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49681 + ... + 51113.

It is an arithmetic number, because the mean of its divisors is an integer number (6117444).

Almost surely, 2^72218901 is an apocalyptic number.

It is an amenable number.

72218901 is a deficient number, since it is larger than the sum of its proper divisors (25660203).

72218901 is a wasteful number, since it uses less digits than its factorization.

72218901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 72218901 is about 8498.1704501616. The cubic root of 72218901 is about 416.4379421650.

The spelling of 72218901 in words is "seventy-two million, two hundred eighteen thousand, nine hundred one".