155222055 has 32 divisors (see below), whose sum is σ = 287953920. Its totient is φ = 79184160.

The previous prime is 155222047. The next prime is 155222063. The reversal of 155222055 is 550222551.

It is an interprime number because it is at equal distance from previous prime (155222047) and next prime (155222063).

It is not a de Polignac number, because 155222055 - 2³ = 155222047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21891 + ... + 28100.

It is an arithmetic number, because the mean of its divisors is an integer number (8998560).

Almost surely, 2^155222055 is an apocalyptic number.

155222055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155222055 is a deficient number, since it is larger than the sum of its proper divisors (132731865).

155222055 is a wasteful number, since it uses less digits than its factorization.

155222055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50028 (or 50022 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 155222055 is about 12458.8143496883. The cubic root of 155222055 is about 537.4249312865.

The spelling of 155222055 in words is "one hundred fifty-five million, two hundred twenty-two thousand, fifty-five".