72310501 has 4 divisors (see below), whose sum is σ = 72378112. Its totient is φ = 72242892.

The previous prime is 72310471. The next prime is 72310519. The reversal of 72310501 is 10501327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10501327 = 263 ⋅39929.

It is a cyclic number.

It is not a de Polignac number, because 72310501 - 2⁷ = 72310373 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 (72310531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32175 + ... + 34348.

It is an arithmetic number, because the mean of its divisors is an integer number (18094528).

Almost surely, 2^72310501 is an apocalyptic number.

It is an amenable number.

72310501 is a deficient number, since it is larger than the sum of its proper divisors (67611).

72310501 is a wasteful number, since it uses less digits than its factorization.

72310501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67610.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 72310501 is about 8503.5581376269. The cubic root of 72310501 is about 416.6139330241.

Adding to 72310501 its reverse (10501327), we get a palindrome (82811828).

The spelling of 72310501 in words is "seventy-two million, three hundred ten thousand, five hundred one".