1550100120 has 256 divisors, whose sum is σ = 5173217280. Its totient is φ = 369868800.

The previous prime is 1550100107. The next prime is 1550100121. The reversal of 1550100120 is 210010551.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1550100120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550100121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3596305 + ... + 3596735.

It is an arithmetic number, because the mean of its divisors is an integer number (20207880).

Almost surely, 2^1550100120 is an apocalyptic number.

1550100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550100120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2586608640).

1550100120 is an abundant number, since it is smaller than the sum of its proper divisors (3623117160).

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

1550100120 is a wasteful number, since it uses less digits than its factorization.

1550100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1550100120 is about 39371.3108747982. The cubic root of 1550100120 is about 1157.3194446465.

Adding to 1550100120 its reverse (210010551), we get a palindrome (1760110671).

The spelling of 1550100120 in words is "one billion, five hundred fifty million, one hundred thousand, one hundred twenty".