72153530 has 16 divisors (see below), whose sum is σ = 135523584. Its totient is φ = 27606480.

The previous prime is 72153503. The next prime is 72153533. The reversal of 72153530 is 3535127.

It is a super-2 number, since 2×72153530² = 10412263782921800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72153530.

It is not an unprimeable number, because it can be changed into a prime (72153533) 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, 156626 + ... + 157085.

It is an arithmetic number, because the mean of its divisors is an integer number (8470224).

Almost surely, 2^72153530 is an apocalyptic number.

72153530 is a deficient number, since it is larger than the sum of its proper divisors (63370054).

72153530 is a wasteful number, since it uses less digits than its factorization.

72153530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313741.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 72153530 is about 8494.3233985998. The cubic root of 72153530 is about 416.3122540032.

Adding to 72153530 its reverse (3535127), we get a palindrome (75688657).

The spelling of 72153530 in words is "seventy-two million, one hundred fifty-three thousand, five hundred thirty".