72214139 has 4 divisors (see below), whose sum is σ = 72251760. Its totient is φ = 72176520.

The previous prime is 72214133. The next prime is 72214151. The reversal of 72214139 is 93141227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93141227 = 491 ⋅189697.

It is a cyclic number.

It is not a de Polignac number, because 72214139 - 2⁴ = 72214123 is a prime.

It is a super-2 number, since 2×72214139² = 10429763743022642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72214133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15767 + ... + 19824.

It is an arithmetic number, because the mean of its divisors is an integer number (18062940).

Almost surely, 2^72214139 is an apocalyptic number.

72214139 is a deficient number, since it is larger than the sum of its proper divisors (37621).

72214139 is a wasteful number, since it uses less digits than its factorization.

72214139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37620.

The product of its digits is 3024, while the sum is 29.

The square root of 72214139 is about 8497.8902675900. The cubic root of 72214139 is about 416.4287888776.

The spelling of 72214139 in words is "seventy-two million, two hundred fourteen thousand, one hundred thirty-nine".