155005501 has 8 divisors (see below), whose sum is σ = 177781824. Its totient is φ = 132387360.

The previous prime is 155005489. The next prime is 155005523. The reversal of 155005501 is 105500551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155005501 - 2¹³ = 154997309 is a prime.

It is a super-2 number, since 2×155005501² = 48053410680522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155005531) 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, 37435 + ... + 41368.

It is an arithmetic number, because the mean of its divisors is an integer number (22222728).

Almost surely, 2^155005501 is an apocalyptic number.

It is an amenable number.

155005501 is a deficient number, since it is larger than the sum of its proper divisors (22776323).

155005501 is an equidigital number, since it uses as much as digits as its factorization.

155005501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79091.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 155005501 is about 12450.1205215050. The cubic root of 155005501 is about 537.1748901808.

It can be divided in two parts, 15500550 and 1, that added together give a palindrome (15500551).

The spelling of 155005501 in words is "one hundred fifty-five million, five thousand, five hundred one".