155281995 has 64 divisors (see below), whose sum is σ = 318919680. Its totient is φ = 70848000.

The previous prime is 155281991. The next prime is 155282051. The reversal of 155281995 is 599182551.

155281995 is a `hidden beast` number, since 1 + 552 + 8 + 1 + 9 + 95 = 666.

It is not a de Polignac number, because 155281995 - 2² = 155281991 is a prime.

It is a super-2 number, since 2×155281995² = 48224995942360050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 155281995.

It is not an unprimeable number, because it can be changed into a prime (155281991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22170 + ... + 28320.

It is an arithmetic number, because the mean of its divisors is an integer number (4983120).

Almost surely, 2^155281995 is an apocalyptic number.

155281995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155281995 is an abundant number, since it is smaller than the sum of its proper divisors (163637685).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155281995 is a wasteful number, since it uses less digits than its factorization.

155281995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193 (or 6187 counting only the distinct ones).

The product of its digits is 162000, while the sum is 45.

The square root of 155281995 is about 12461.2196433575. The cubic root of 155281995 is about 537.4940990879.

The spelling of 155281995 in words is "one hundred fifty-five million, two hundred eighty-one thousand, nine hundred ninety-five".