72305157 has 8 divisors (see below), whose sum is σ = 96449184. Its totient is φ = 48182288.

The previous prime is 72305153. The next prime is 72305161. The reversal of 72305157 is 75150327.

It is an interprime number because it is at equal distance from previous prime (72305153) and next prime (72305161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72305157 - 2² = 72305153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72305153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6343 + ... + 13595.

It is an arithmetic number, because the mean of its divisors is an integer number (12056148).

Almost surely, 2^72305157 is an apocalyptic number.

It is an amenable number.

72305157 is a deficient number, since it is larger than the sum of its proper divisors (24144027).

72305157 is a wasteful number, since it uses less digits than its factorization.

72305157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10579.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 72305157 is about 8503.2439104144. The cubic root of 72305157 is about 416.6036696936.

The spelling of 72305157 in words is "seventy-two million, three hundred five thousand, one hundred fifty-seven".