155055099 has 16 divisors (see below), whose sum is σ = 209475360. Its totient is φ = 102009600.

The previous prime is 155055077. The next prime is 155055101. The reversal of 155055099 is 990550551.

It is a happy number.

It is not a de Polignac number, because 155055099 - 2⁸ = 155054843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155055499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119647 + ... + 120935.

It is an arithmetic number, because the mean of its divisors is an integer number (13092210).

Almost surely, 2^155055099 is an apocalyptic number.

155055099 is a deficient number, since it is larger than the sum of its proper divisors (54420261).

155055099 is a wasteful number, since it uses less digits than its factorization.

155055099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790.

The product of its (nonzero) digits is 50625, while the sum is 39.

The square root of 155055099 is about 12452.1122304611. The cubic root of 155055099 is about 537.2321783821.

The spelling of 155055099 in words is "one hundred fifty-five million, fifty-five thousand, ninety-nine".