155423222140 has 24 divisors (see below), whose sum is σ = 326433475872. Its totient is φ = 62160772800.

The previous prime is 155423222111. The next prime is 155423222167. The reversal of 155423222140 is 41222324551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381559 + ... + 675598.

It is an arithmetic number, because the mean of its divisors is an integer number (13601394828).

Almost surely, 2^155423222140 is an apocalyptic number.

155423222140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155423222140 is an abundant number, since it is smaller than the sum of its proper divisors (171010253732).

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

155423222140 is a wasteful number, since it uses less digits than its factorization.

155423222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064517 (or 1064515 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 155423222140 its reverse (41222324551), we get a palindrome (196645546691).

The spelling of 155423222140 in words is "one hundred fifty-five billion, four hundred twenty-three million, two hundred twenty-two thousand, one hundred forty".