1550204120 has 32 divisors (see below), whose sum is σ = 3489112800. Its totient is φ = 619876608.

The previous prime is 1550204101. The next prime is 1550204141. The reversal of 1550204120 is 214020551.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1550204092 and 1550204101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191597 + ... + 199523.

It is an arithmetic number, because the mean of its divisors is an integer number (109034775).

Almost surely, 2^1550204120 is an apocalyptic number.

1550204120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550204120 is an abundant number, since it is smaller than the sum of its proper divisors (1938908680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1550204120 is a wasteful number, since it uses less digits than its factorization.

1550204120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12827 (or 12823 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1550204120 is about 39372.6316113109. The cubic root of 1550204120 is about 1157.3453265296.

Adding to 1550204120 its reverse (214020551), we get a palindrome (1764224671).

The spelling of 1550204120 in words is "one billion, five hundred fifty million, two hundred four thousand, one hundred twenty".