72111451 has 2 divisors, whose sum is σ = 72111452. Its totient is φ = 72111450.

The previous prime is 72111421. The next prime is 72111461. The reversal of 72111451 is 15411127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72111451 - 2⁹ = 72110939 is a prime.

It is a super-2 number, since 2×72111451² = 10400122730650802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72111421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36055725 + 36055726.

It is an arithmetic number, because the mean of its divisors is an integer number (36055726).

Almost surely, 2^72111451 is an apocalyptic number.

72111451 is a deficient number, since it is larger than the sum of its proper divisors (1).

72111451 is an equidigital number, since it uses as much as digits as its factorization.

72111451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 22.

The square root of 72111451 is about 8491.8461479233. The cubic root of 72111451 is about 416.2313089690.

Adding to 72111451 its reverse (15411127), we get a palindrome (87522578).

The spelling of 72111451 in words is "seventy-two million, one hundred eleven thousand, four hundred fifty-one".