155540022 has 32 divisors (see below), whose sum is σ = 340049664. Its totient is φ = 47037600.

The previous prime is 155540009. The next prime is 155540039. The reversal of 155540022 is 220045551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155539974 and 155540001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34647 + ... + 38877.

It is an arithmetic number, because the mean of its divisors is an integer number (10626552).

Almost surely, 2^155540022 is an apocalyptic number.

155540022 is an abundant number, since it is smaller than the sum of its proper divisors (184509642).

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

155540022 is a wasteful number, since it uses less digits than its factorization.

155540022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 155540022 is about 12471.5685460972. The cubic root of 155540022 is about 537.7916464479.

Adding to 155540022 its reverse (220045551), we get a palindrome (375585573).

The spelling of 155540022 in words is "one hundred fifty-five million, five hundred forty thousand, twenty-two".