155055505 has 16 divisors (see below), whose sum is σ = 203652864. Its totient is φ = 112394880.

The previous prime is 155055499. The next prime is 155055541. The reversal of 155055505 is 505550551.

It is not a de Polignac number, because 155055505 - 2³ = 155055497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12712 + ... + 21718.

It is an arithmetic number, because the mean of its divisors is an integer number (12728304).

Almost surely, 2^155055505 is an apocalyptic number.

It is an amenable number.

155055505 is a deficient number, since it is larger than the sum of its proper divisors (48597359).

155055505 is a wasteful number, since it uses less digits than its factorization.

155055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336.

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

The square root of 155055505 is about 12452.1285329055. The cubic root of 155055505 is about 537.2326472823.

The spelling of 155055505 in words is "one hundred fifty-five million, fifty-five thousand, five hundred five".