1550121223 has 12 divisors (see below), whose sum is σ = 1804666512. Its totient is φ = 1327596480.

The previous prime is 1550121191. The next prime is 1550121229. The reversal of 1550121223 is 3221210551.

It is not a de Polignac number, because 1550121223 - 2⁵ = 1550121191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1550121194 and 1550121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550121229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51358 + ... + 75748.

It is an arithmetic number, because the mean of its divisors is an integer number (150388876).

Almost surely, 2^1550121223 is an apocalyptic number.

1550121223 is a deficient number, since it is larger than the sum of its proper divisors (254545289).

1550121223 is a wasteful number, since it uses less digits than its factorization.

1550121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25702 (or 25695 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1550121223 is about 39371.5788735987. The cubic root of 1550121223 is about 1157.3246965226.

Adding to 1550121223 its reverse (3221210551), we get a palindrome (4771331774).

The spelling of 1550121223 in words is "one billion, five hundred fifty million, one hundred twenty-one thousand, two hundred twenty-three".