72521051 has 2 divisors, whose sum is σ = 72521052. Its totient is φ = 72521050.

The previous prime is 72521023. The next prime is 72521063. The reversal of 72521051 is 15012527.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72521051 - 2¹⁴ = 72504667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72521011) 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, 36260525 + 36260526.

It is an arithmetic number, because the mean of its divisors is an integer number (36260526).

Almost surely, 2^72521051 is an apocalyptic number.

72521051 is a deficient number, since it is larger than the sum of its proper divisors (1).

72521051 is an equidigital number, since it uses as much as digits as its factorization.

72521051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 72521051 is about 8515.9292505281. The cubic root of 72521051 is about 417.0178995397.

Adding to 72521051 its reverse (15012527), we get a palindrome (87533578).

The spelling of 72521051 in words is "seventy-two million, five hundred twenty-one thousand, fifty-one".