72545226 has 64 divisors (see below), whose sum is σ = 161656320. Its totient is φ = 21565440.

The previous prime is 72545203. The next prime is 72545227. The reversal of 72545226 is 62254527.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72545227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375786 + ... + 375978.

It is an arithmetic number, because the mean of its divisors is an integer number (2525880).

Almost surely, 2^72545226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72545226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80828160).

72545226 is an abundant number, since it is smaller than the sum of its proper divisors (89111094).

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

72545226 is a wasteful number, since it uses less digits than its factorization.

72545226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 33600, while the sum is 33.

The square root of 72545226 is about 8517.3485310864. The cubic root of 72545226 is about 417.0642322370.

It can be divided in two parts, 72545 and 226, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 72545226 in words is "seventy-two million, five hundred forty-five thousand, two hundred twenty-six".