72341551 has 2 divisors, whose sum is σ = 72341552. Its totient is φ = 72341550.

The previous prime is 72341539. The next prime is 72341557. The reversal of 72341551 is 15514327.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72341551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72341557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36170775 + 36170776.

It is an arithmetic number, because the mean of its divisors is an integer number (36170776).

Almost surely, 2^72341551 is an apocalyptic number.

72341551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72341551 is an equidigital number, since it uses as much as digits as its factorization.

72341551 is an odious number, because the sum of its binary digits is odd.

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

The square root of 72341551 is about 8505.3836480196. The cubic root of 72341551 is about 416.6735555839.

Adding to 72341551 its reverse (15514327), we get a palindrome (87855878).

The spelling of 72341551 in words is "seventy-two million, three hundred forty-one thousand, five hundred fifty-one".