155485881 has 6 divisors (see below), whose sum is σ = 224590730. Its totient is φ = 103657248.

The previous prime is 155485879. The next prime is 155485901. The reversal of 155485881 is 188584551.

155485881 is a `hidden beast` number, since 15 + 54 + 8 + 588 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96825600 + 58660281 = 9840^2 + 7659^2 .

It is not a de Polignac number, because 155485881 - 2¹ = 155485879 is a prime.

It is a super-2 number, since 2×155485881² = 48351718380692322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155485831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8638096 + ... + 8638113.

Almost surely, 2^155485881 is an apocalyptic number.

It is an amenable number.

155485881 is a deficient number, since it is larger than the sum of its proper divisors (69104849).

155485881 is a wasteful number, since it uses less digits than its factorization.

155485881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17276215 (or 17276212 counting only the distinct ones).

The product of its digits is 256000, while the sum is 45.

The square root of 155485881 is about 12469.3977801656. The cubic root of 155485881 is about 537.7292403092.

The spelling of 155485881 in words is "one hundred fifty-five million, four hundred eighty-five thousand, eight hundred eighty-one".