155550055 has 32 divisors (see below), whose sum is σ = 205286400. Its totient is φ = 112694400.

The previous prime is 155550053. The next prime is 155550089. The reversal of 155550055 is 550055551.

It is not a de Polignac number, because 155550055 - 2¹ = 155550053 is a prime.

It is a super-2 number, since 2×155550055² = 48391639221006050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155549999 and 155550026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155550053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360690 + ... + 361120.

It is an arithmetic number, because the mean of its divisors is an integer number (6415200).

Almost surely, 2^155550055 is an apocalyptic number.

155550055 is a deficient number, since it is larger than the sum of its proper divisors (49736345).

155550055 is a wasteful number, since it uses less digits than its factorization.

155550055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its (nonzero) digits is 15625, while the sum is 31.

The square root of 155550055 is about 12471.9707745007. The cubic root of 155550055 is about 537.8032094902.

The spelling of 155550055 in words is "one hundred fifty-five million, five hundred fifty thousand, fifty-five".