153981555 has 32 divisors (see below), whose sum is σ = 303227904. Its totient is φ = 64976256.

The previous prime is 153981551. The next prime is 153981577. The reversal of 153981555 is 555189351.

153981555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 153981555 - 2² = 153981551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (153981551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55039 + ... + 57768.

It is an arithmetic number, because the mean of its divisors is an integer number (9475872).

Almost surely, 2^153981555 is an apocalyptic number.

153981555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

153981555 is a deficient number, since it is larger than the sum of its proper divisors (149246349).

153981555 is a wasteful number, since it uses less digits than its factorization.

153981555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112835.

The product of its digits is 135000, while the sum is 42.

The square root of 153981555 is about 12408.9304535081. The cubic root of 153981555 is about 535.9894404153.

The spelling of 153981555 in words is "one hundred fifty-three million, nine hundred eighty-one thousand, five hundred fifty-five".