72210761 has 8 divisors (see below), whose sum is σ = 84211200. Its totient is φ = 61894644.

The previous prime is 72210709. The next prime is 72210821. The reversal of 72210761 is 16701227.

It is a de Polignac number, because none of the positive numbers 2^k-72210761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72210761.

It is not an unprimeable number, because it can be changed into a prime (72210701) 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, 104921 + ... + 105606.

It is an arithmetic number, because the mean of its divisors is an integer number (10526400).

Almost surely, 2^72210761 is an apocalyptic number.

It is an amenable number.

72210761 is a deficient number, since it is larger than the sum of its proper divisors (12000439).

72210761 is an equidigital number, since it uses as much as digits as its factorization.

72210761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210548 (or 210534 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 72210761 is about 8497.6915100514. The cubic root of 72210761 is about 416.4222956045.

Adding to 72210761 its reverse (16701227), we get a palindrome (88911988).

The spelling of 72210761 in words is "seventy-two million, two hundred ten thousand, seven hundred sixty-one".