153997855 has 32 divisors (see below), whose sum is σ = 206826048. Its totient is φ = 109132800.

The previous prime is 153997843. The next prime is 153997861. The reversal of 153997855 is 558799351.

It is not a de Polignac number, because 153997855 - 2¹³ = 153989663 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 660819 + ... + 661051.

It is an arithmetic number, because the mean of its divisors is an integer number (6463314).

Almost surely, 2^153997855 is an apocalyptic number.

153997855 is a deficient number, since it is larger than the sum of its proper divisors (52828193).

153997855 is a wasteful number, since it uses less digits than its factorization.

153997855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507.

The product of its digits is 1701000, while the sum is 52.

The square root of 153997855 is about 12409.5872211770. The cubic root of 153997855 is about 536.0083524632.

The spelling of 153997855 in words is "one hundred fifty-three million, nine hundred ninety-seven thousand, eight hundred fifty-five".