72302553 has 12 divisors (see below), whose sum is σ = 106207920. Its totient is φ = 47384376.

The previous prime is 72302533. The next prime is 72302561. The reversal of 72302553 is 35520327.

It is not a de Polignac number, because 72302553 - 2⁵ = 72302521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72302533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67551 + ... + 68612.

It is an arithmetic number, because the mean of its divisors is an integer number (8850660).

Almost surely, 2^72302553 is an apocalyptic number.

It is an amenable number.

72302553 is a deficient number, since it is larger than the sum of its proper divisors (33905367).

72302553 is a wasteful number, since it uses less digits than its factorization.

72302553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136228 (or 136225 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 72302553 is about 8503.0907910006. The cubic root of 72302553 is about 416.5986684414.

The spelling of 72302553 in words is "seventy-two million, three hundred two thousand, five hundred fifty-three".