153997550 has 48 divisors (see below), whose sum is σ = 332767392. Its totient is φ = 51926400.

The previous prime is 153997549. The next prime is 153997561. The reversal of 153997550 is 55799351.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17744 + ... + 24956.

It is an arithmetic number, because the mean of its divisors is an integer number (6932654).

Almost surely, 2^153997550 is an apocalyptic number.

153997550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

153997550 is an abundant number, since it is smaller than the sum of its proper divisors (178769842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

153997550 is a wasteful number, since it uses less digits than its factorization.

153997550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7293 (or 7288 counting only the distinct ones).

The product of its (nonzero) digits is 212625, while the sum is 44.

The square root of 153997550 is about 12409.5749322852. The cubic root of 153997550 is about 536.0079985997.

The spelling of 153997550 in words is "one hundred fifty-three million, nine hundred ninety-seven thousand, five hundred fifty".