72561310 has 16 divisors (see below), whose sum is σ = 130741776. Its totient is φ = 28995328.

The previous prime is 72561299. The next prime is 72561311. The reversal of 72561310 is 1316527.

It is a super-2 number, since 2×72561310² = 10530287417832200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72561311) 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, 8814 + ... + 14926.

It is an arithmetic number, because the mean of its divisors is an integer number (8171361).

Almost surely, 2^72561310 is an apocalyptic number.

72561310 is a deficient number, since it is larger than the sum of its proper divisors (58180466).

72561310 is a wasteful number, since it uses less digits than its factorization.

72561310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 72561310 is about 8518.2926693088. The cubic root of 72561310 is about 417.0950523924.

Adding to 72561310 its reverse (1316527), we get a palindrome (73877837).

The spelling of 72561310 in words is "seventy-two million, five hundred sixty-one thousand, three hundred ten".