1551516120 has 448 divisors, whose sum is σ = 6534915840. Its totient is φ = 321926400.

The previous prime is 1551516077. The next prime is 1551516133. The reversal of 1551516120 is 216151551.

1551516120 is a `hidden beast` number, since 1 + 551 + 51 + 61 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2244975 + ... + 2245665.

Almost surely, 2^1551516120 is an apocalyptic number.

1551516120 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 1551516120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3267457920).

1551516120 is an abundant number, since it is smaller than the sum of its proper divisors (4983399720).

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

1551516120 is a wasteful number, since it uses less digits than its factorization.

1551516120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 1551516120 is about 39389.2894071472. The cubic root of 1551516120 is about 1157.6717370710.

Adding to 1551516120 its reverse (216151551), we get a palindrome (1767667671).

The spelling of 1551516120 in words is "one billion, five hundred fifty-one million, five hundred sixteen thousand, one hundred twenty".