155503232115 has 64 divisors (see below), whose sum is σ = 310252142592. Its totient is φ = 64613577600.

The previous prime is 155503232089. The next prime is 155503232147. The reversal of 155503232115 is 511232305551.

It is a happy number.

It is not a de Polignac number, because 155503232115 - 2²⁹ = 154966361203 is a prime.

It is a super-3 number, since 3×155503232115³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13058254 + ... + 13070156.

It is an arithmetic number, because the mean of its divisors is an integer number (4847689728).

Almost surely, 2^155503232115 is an apocalyptic number.

155503232115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155503232115 is a deficient number, since it is larger than the sum of its proper divisors (154748910477).

155503232115 is a wasteful number, since it uses less digits than its factorization.

155503232115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23240.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 155503232115 its reverse (511232305551), we get a palindrome (666735537666).

The spelling of 155503232115 in words is "one hundred fifty-five billion, five hundred three million, two hundred thirty-two thousand, one hundred fifteen".