155055623 has 8 divisors (see below), whose sum is σ = 164337840. Its totient is φ = 145791360.

The previous prime is 155055617. The next prime is 155055643. The reversal of 155055623 is 326550551.

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 155055623 - 2¹² = 155051527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155055623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055613) 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, 16013 + ... + 23801.

It is an arithmetic number, because the mean of its divisors is an integer number (20542230).

Almost surely, 2^155055623 is an apocalyptic number.

155055623 is a deficient number, since it is larger than the sum of its proper divisors (9282217).

155055623 is a wasteful number, since it uses less digits than its factorization.

155055623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8977.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 155055623 is about 12452.1332710504. The cubic root of 155055623 is about 537.2327835634.

The spelling of 155055623 in words is "one hundred fifty-five million, fifty-five thousand, six hundred twenty-three".