155231200040 has 64 divisors (see below), whose sum is σ = 420174691200. Its totient is φ = 50420959488.

The previous prime is 155231200039. The next prime is 155231200049. The reversal of 155231200040 is 40002132551.

It is a junction number, because it is equal to n+sod(n) for n = 155231199979 and 155231200015.

It is not an unprimeable number, because it can be changed into a prime (155231200049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14584079 + ... + 14594718.

It is an arithmetic number, because the mean of its divisors is an integer number (6565229550).

Almost surely, 2^155231200040 is an apocalyptic number.

155231200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155231200040 is an abundant number, since it is smaller than the sum of its proper divisors (264943491160).

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

155231200040 is a wasteful number, since it uses less digits than its factorization.

155231200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29178834 (or 29178830 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 155231200040 its reverse (40002132551), we get a palindrome (195233332591).

The spelling of 155231200040 in words is "one hundred fifty-five billion, two hundred thirty-one million, two hundred thousand, forty".