1223881438551 has 8 divisors (see below), whose sum is σ = 1631848746864. Its totient is φ = 815917544640.

The previous prime is 1223881438547. The next prime is 1223881438579. The reversal of 1223881438551 is 1558341883221.

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

It is not a de Polignac number, because 1223881438551 - 2² = 1223881438547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223881438494 and 1223881438503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223881434551) 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, 152025 + ... + 1571901.

It is an arithmetic number, because the mean of its divisors is an integer number (203981093358).

Almost surely, 2^{1223881438551} is an apocalyptic number.

1223881438551 is a deficient number, since it is larger than the sum of its proper divisors (407967308313).

1223881438551 is a wasteful number, since it uses less digits than its factorization.

1223881438551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707201.

The product of its digits is 1843200, while the sum is 51.

The spelling of 1223881438551 in words is "one trillion, two hundred twenty-three billion, eight hundred eighty-one million, four hundred thirty-eight thousand, five hundred fifty-one".