155240255015 has 16 divisors (see below), whose sum is σ = 197125664256. Its totient is φ = 117119402400.

The previous prime is 155240255011. The next prime is 155240255021. The reversal of 155240255015 is 510552042551.

It is not a de Polignac number, because 155240255015 - 2² = 155240255011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155240255011) 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, 9498281 + ... + 9514610.

It is an arithmetic number, because the mean of its divisors is an integer number (12320354016).

Almost surely, 2^155240255015 is an apocalyptic number.

155240255015 is a deficient number, since it is larger than the sum of its proper divisors (41885409241).

155240255015 is a wasteful number, since it uses less digits than its factorization.

155240255015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19012990.

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 155240255015 its reverse (510552042551), we get a palindrome (665792297566).

The spelling of 155240255015 in words is "one hundred fifty-five billion, two hundred forty million, two hundred fifty-five thousand, fifteen".