72211951 has 8 divisors (see below), whose sum is σ = 86871680. Its totient is φ = 58638168.

The previous prime is 72211933. The next prime is 72211957. The reversal of 72211951 is 15911227.

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

It is a cyclic number.

It is not a de Polignac number, because 72211951 - 2¹³ = 72203759 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72211957) 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, 271341 + ... + 271606.

It is an arithmetic number, because the mean of its divisors is an integer number (10858960).

Almost surely, 2^72211951 is an apocalyptic number.

72211951 is a deficient number, since it is larger than the sum of its proper divisors (14659729).

72211951 is a wasteful number, since it uses less digits than its factorization.

72211951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542973.

The product of its digits is 1260, while the sum is 28.

The square root of 72211951 is about 8497.7615287792. The cubic root of 72211951 is about 416.4245830743.

The spelling of 72211951 in words is "seventy-two million, two hundred eleven thousand, nine hundred fifty-one".