72212061 has 8 divisors (see below), whose sum is σ = 96350464. Its totient is φ = 48107520.

The previous prime is 72212011. The next prime is 72212087. The reversal of 72212061 is 16021227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72212061 - 2⁷ = 72211933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72212011) 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, 2980 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (12043808).

Almost surely, 2^72212061 is an apocalyptic number.

It is an amenable number.

72212061 is a deficient number, since it is larger than the sum of its proper divisors (24138403).

72212061 is a wasteful number, since it uses less digits than its factorization.

72212061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16931.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 72212061 is about 8497.7680010695. The cubic root of 72212061 is about 416.4247945198.

Adding to 72212061 its reverse (16021227), we get a palindrome (88233288).

The spelling of 72212061 in words is "seventy-two million, two hundred twelve thousand, sixty-one".