72314551 has 4 divisors (see below), whose sum is σ = 76120600. Its totient is φ = 68508504.

The previous prime is 72314533. The next prime is 72314569. The reversal of 72314551 is 15541327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15541327 = 3217 ⋅4831.

It is an interprime number because it is at equal distance from previous prime (72314533) and next prime (72314569).

It is a cyclic number.

It is not a de Polignac number, because 72314551 - 2²³ = 63925943 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 (72314531) 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 3 ways as a sum of consecutive naturals, for example, 1902996 + ... + 1903033.

It is an arithmetic number, because the mean of its divisors is an integer number (19030150).

Almost surely, 2^72314551 is an apocalyptic number.

72314551 is a deficient number, since it is larger than the sum of its proper divisors (3806049).

72314551 is a wasteful number, since it uses less digits than its factorization.

72314551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806048.

The product of its digits is 4200, while the sum is 28.

The square root of 72314551 is about 8503.7962699020. The cubic root of 72314551 is about 416.6217108475.

Adding to 72314551 its reverse (15541327), we get a palindrome (87855878).

The spelling of 72314551 in words is "seventy-two million, three hundred fourteen thousand, five hundred fifty-one".