1423165550 has 48 divisors (see below), whose sum is σ = 2833747200. Its totient is φ = 530143200.

The previous prime is 1423165543. The next prime is 1423165561. The reversal of 1423165550 is 555613241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43355 + ... + 68745.

It is an arithmetic number, because the mean of its divisors is an integer number (59036400).

Almost surely, 2^1423165550 is an apocalyptic number.

1423165550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1423165550 is a deficient number, since it is larger than the sum of its proper divisors (1410581650).

1423165550 is a wasteful number, since it uses less digits than its factorization.

1423165550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25481 (or 25476 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1423165550 is about 37724.8664676232. The cubic root of 1423165550 is about 1124.8254675747.

Adding to 1423165550 its reverse (555613241), we get a palindrome (1978778791).

The spelling of 1423165550 in words is "one billion, four hundred twenty-three million, one hundred sixty-five thousand, five hundred fifty".