155505050 has 12 divisors (see below), whose sum is σ = 289239486. Its totient is φ = 62202000.

The previous prime is 155505041. The next prime is 155505109. The reversal of 155505050 is 50505551.

It can be written as a sum of positive squares in 3 ways, for example, as 145130209 + 10374841 = 12047^2 + 3221^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1555001 + ... + 1555100.

Almost surely, 2^155505050 is an apocalyptic number.

155505050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155505050 is a deficient number, since it is larger than the sum of its proper divisors (133734436).

155505050 is a wasteful number, since it uses less digits than its factorization.

155505050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110113 (or 3110108 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 155505050 is about 12470.1663982483. The cubic root of 155505050 is about 537.7513372957.

The spelling of 155505050 in words is "one hundred fifty-five million, five hundred five thousand, fifty".