72234261 has 20 divisors (see below), whose sum is σ = 117716544. Its totient is φ = 43777800.

The previous prime is 72234259. The next prime is 72234263. The reversal of 72234261 is 16243227.

It is an interprime number because it is at equal distance from previous prime (72234259) and next prime (72234263).

It is not a de Polignac number, because 72234261 - 2¹ = 72234259 is a prime.

It is a super-2 number, since 2×72234261² = 10435576924432242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72234263) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39645 + ... + 41426.

Almost surely, 2^72234261 is an apocalyptic number.

It is an amenable number.

72234261 is a deficient number, since it is larger than the sum of its proper divisors (45482283).

72234261 is a wasteful number, since it uses less digits than its factorization.

72234261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81094 (or 81085 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 72234261 is about 8499.0741260446. The cubic root of 72234261 is about 416.4674636766.

Adding to 72234261 its reverse (16243227), we get a palindrome (88477488).

The spelling of 72234261 in words is "seventy-two million, two hundred thirty-four thousand, two hundred sixty-one".