155331045 has 24 divisors (see below), whose sum is σ = 269575800. Its totient is φ = 82740096.

The previous prime is 155331041. The next prime is 155331053. The reversal of 155331045 is 540133551.

155331045 is a `hidden beast` number, since 1 + 553 + 3 + 104 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6320196 + 149010849 = 2514^2 + 12207^2 .

It is not a de Polignac number, because 155331045 - 2² = 155331041 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155331041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46491 + ... + 49719.

It is an arithmetic number, because the mean of its divisors is an integer number (11232325).

Almost surely, 2^155331045 is an apocalyptic number.

155331045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155331045 is a deficient number, since it is larger than the sum of its proper divisors (114244755).

155331045 is a wasteful number, since it uses less digits than its factorization.

155331045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 155331045 is about 12463.1875938702. The cubic root of 155331045 is about 537.5506871255.

Adding to 155331045 its reverse (540133551), we get a palindrome (695464596).

The spelling of 155331045 in words is "one hundred fifty-five million, three hundred thirty-one thousand, forty-five".