72212472 has 40 divisors (see below), whose sum is σ = 202263600. Its totient is φ = 24070608.

The previous prime is 72212461. The next prime is 72212473. The reversal of 72212472 is 27421227.

It is a super-2 number, since 2×72212472² = 10429282224701568, 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 (72212473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55072 + ... + 56367.

It is an arithmetic number, because the mean of its divisors is an integer number (5056590).

Almost surely, 2^72212472 is an apocalyptic number.

72212472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

72212472 is an abundant number, since it is smaller than the sum of its proper divisors (130051128).

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

72212472 is a wasteful number, since it uses less digits than its factorization.

72212472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111457 (or 111444 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 72212472 is about 8497.7921838558. The cubic root of 72212472 is about 416.4255845553.

Adding to 72212472 its reverse (27421227), we get a palindrome (99633699).

The spelling of 72212472 in words is "seventy-two million, two hundred twelve thousand, four hundred seventy-two".