155006985 has 32 divisors (see below), whose sum is σ = 284947200. Its totient is φ = 70483968.

The previous prime is 155006963. The next prime is 155006993. The reversal of 155006985 is 589600551.

It is not a de Polignac number, because 155006985 - 2⁵ = 155006953 is a prime.

It is a Curzon 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, 16441 + ... + 24089.

It is an arithmetic number, because the mean of its divisors is an integer number (8904600).

Almost surely, 2^155006985 is an apocalyptic number.

155006985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155006985 is a deficient number, since it is larger than the sum of its proper divisors (129940215).

155006985 is a wasteful number, since it uses less digits than its factorization.

155006985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 155006985 is about 12450.1801191790. The cubic root of 155006985 is about 537.1766044533.

The spelling of 155006985 in words is "one hundred fifty-five million, six thousand, nine hundred eighty-five".