72232537 has 8 divisors (see below), whose sum is σ = 77885640. Its totient is φ = 66593280.

The previous prime is 72232519. The next prime is 72232543. The reversal of 72232537 is 73523227.

It can be written as a sum of positive squares in 4 ways, for example, as 12880921 + 59351616 = 3589^2 + 7704^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72232537 - 2⁷ = 72232409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72232499 and 72232508.

It is not an unprimeable number, because it can be changed into a prime (72232577) 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 in 7 ways as a sum of consecutive naturals, for example, 9087 + ... + 15067.

It is an arithmetic number, because the mean of its divisors is an integer number (9735705).

Almost surely, 2^72232537 is an apocalyptic number.

It is an amenable number.

72232537 is a deficient number, since it is larger than the sum of its proper divisors (5653103).

72232537 is a wasteful number, since it uses less digits than its factorization.

72232537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923.

The product of its digits is 17640, while the sum is 31.

The square root of 72232537 is about 8498.9727026271. The cubic root of 72232537 is about 416.4641504029.

The spelling of 72232537 in words is "seventy-two million, two hundred thirty-two thousand, five hundred thirty-seven".