155556101 has 8 divisors (see below), whose sum is σ = 158419008. Its totient is φ = 152712000.

The previous prime is 155556083. The next prime is 155556119. The reversal of 155556101 is 101655551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155556083) and next prime (155556119).

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 155556101 - 2²⁶ = 88447237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155556131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12566 + ... + 21656.

It is an arithmetic number, because the mean of its divisors is an integer number (19802376).

Almost surely, 2^155556101 is an apocalyptic number.

It is an amenable number.

155556101 is a deficient number, since it is larger than the sum of its proper divisors (2862907).

155556101 is an equidigital number, since it uses as much as digits as its factorization.

155556101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 155556101 is about 12472.2131556512. The cubic root of 155556101 is about 537.8101772710.

The spelling of 155556101 in words is "one hundred fifty-five million, five hundred fifty-six thousand, one hundred one".