155512032223 has 8 divisors (see below), whose sum is σ = 159698580480. Its totient is φ = 151380935160.

The previous prime is 155512032209. The next prime is 155512032233. The reversal of 155512032223 is 322230215551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155512032223 is a prime.

It is a super-2 number, since 2×155512032223² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155512032233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13857115 + ... + 13868332.

It is an arithmetic number, because the mean of its divisors is an integer number (19962322560).

Almost surely, 2^155512032223 is an apocalyptic number.

155512032223 is a deficient number, since it is larger than the sum of its proper divisors (4186548257).

155512032223 is an equidigital number, since it uses as much as digits as its factorization.

155512032223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27725597.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 155512032223 its reverse (322230215551), we get a palindrome (477742247774).

The spelling of 155512032223 in words is "one hundred fifty-five billion, five hundred twelve million, thirty-two thousand, two hundred twenty-three".