12240251555 has 16 divisors (see below), whose sum is σ = 16840277184. Its totient is φ = 8366492160.

The previous prime is 12240251537. The next prime is 12240251563. The reversal of 12240251555 is 55515204221.

It is a happy number.

It is not a de Polignac number, because 12240251555 - 2²⁴ = 12223474339 is a prime.

It is a super-3 number, since 3×12240251555³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547706 + ... + 569615.

It is an arithmetic number, because the mean of its divisors is an integer number (1052517324).

Almost surely, 2^12240251555 is an apocalyptic number.

12240251555 is a deficient number, since it is larger than the sum of its proper divisors (4600025629).

12240251555 is a wasteful number, since it uses less digits than its factorization.

12240251555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117646.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 12240251555 its reverse (55515204221), we get a palindrome (67755455776).

The spelling of 12240251555 in words is "twelve billion, two hundred forty million, two hundred fifty-one thousand, five hundred fifty-five".