72531641 has 8 divisors (see below), whose sum is σ = 89269824. Its totient is φ = 57387600.

The previous prime is 72531637. The next prime is 72531643. The reversal of 72531641 is 14613527.

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

It is a cyclic number.

It is not a de Polignac number, because 72531641 - 2² = 72531637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72531643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398435 + ... + 398616.

It is an arithmetic number, because the mean of its divisors is an integer number (11158728).

Almost surely, 2^72531641 is an apocalyptic number.

It is an amenable number.

72531641 is a deficient number, since it is larger than the sum of its proper divisors (16738183).

72531641 is a wasteful number, since it uses less digits than its factorization.

72531641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797071.

The product of its digits is 5040, while the sum is 29.

The square root of 72531641 is about 8516.5510037808. The cubic root of 72531641 is about 417.0381971156.

The spelling of 72531641 in words is "seventy-two million, five hundred thirty-one thousand, six hundred forty-one".