1551413320 has 16 divisors (see below), whose sum is σ = 3490680060. Its totient is φ = 620565312.

The previous prime is 1551413287. The next prime is 1551413359. The reversal of 1551413320 is 233141551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1522404324 + 29008996 = 39018^2 + 5386^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19392627 + ... + 19392706.

Almost surely, 2^1551413320 is an apocalyptic number.

1551413320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551413320 is an abundant number, since it is smaller than the sum of its proper divisors (1939266740).

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

1551413320 is a wasteful number, since it uses less digits than its factorization.

1551413320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38785344 (or 38785340 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1551413320 is about 39387.9844622697. The cubic root of 1551413320 is about 1157.6461682566.

Adding to 1551413320 its reverse (233141551), we get a palindrome (1784554871).

The spelling of 1551413320 in words is "one billion, five hundred fifty-one million, four hundred thirteen thousand, three hundred twenty".