153972257 has 16 divisors (see below), whose sum is σ = 169643520. Its totient is φ = 139190400.

The previous prime is 153972253. The next prime is 153972277. The reversal of 153972257 is 752279351.

It is a cyclic number.

It is not a de Polignac number, because 153972257 - 2² = 153972253 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153972253) 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 15 ways as a sum of consecutive naturals, for example, 41207 + ... + 44787.

It is an arithmetic number, because the mean of its divisors is an integer number (10602720).

Almost surely, 2^153972257 is an apocalyptic number.

It is an amenable number.

153972257 is a deficient number, since it is larger than the sum of its proper divisors (15671263).

153972257 is a wasteful number, since it uses less digits than its factorization.

153972257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704.

The product of its digits is 132300, while the sum is 41.

The square root of 153972257 is about 12408.5557983192. Note that the first 3 decimals coincide. The cubic root of 153972257 is about 535.9786518285.

The spelling of 153972257 in words is "one hundred fifty-three million, nine hundred seventy-two thousand, two hundred fifty-seven".