155553923 has 8 divisors (see below), whose sum is σ = 180026880. Its totient is φ = 131643720.

The previous prime is 155553911. The next prime is 155553949. The reversal of 155553923 is 329355551.

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 155553923 - 2²⁰ = 154505347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155552923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140093 + ... + 141198.

It is an arithmetic number, because the mean of its divisors is an integer number (22503360).

Almost surely, 2^155553923 is an apocalyptic number.

155553923 is a deficient number, since it is larger than the sum of its proper divisors (24472957).

155553923 is an equidigital number, since it uses as much as digits as its factorization.

155553923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281377.

The product of its digits is 101250, while the sum is 38.

The square root of 155553923 is about 12472.1258412510. The cubic root of 155553923 is about 537.8076672312.

The spelling of 155553923 in words is "one hundred fifty-five million, five hundred fifty-three thousand, nine hundred twenty-three".