1550553420 has 48 divisors (see below), whose sum is σ = 4675517280. Its totient is φ = 381674496.

The previous prime is 1550553419. The next prime is 1550553421. The reversal of 1550553420 is 243550551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1550553419) and next prime (1550553421).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1550553421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993165 + ... + 994724.

It is an arithmetic number, because the mean of its divisors is an integer number (97406610).

Almost surely, 2^1550553420 is an apocalyptic number.

1550553420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550553420 is an abundant number, since it is smaller than the sum of its proper divisors (3124963860).

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

1550553420 is a wasteful number, since it uses less digits than its factorization.

1550553420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987914 (or 1987912 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1550553420 is about 39377.0671838318. The cubic root of 1550553420 is about 1157.4322463440.

The spelling of 1550553420 in words is "one billion, five hundred fifty million, five hundred fifty-three thousand, four hundred twenty".