1551350481 has 8 divisors (see below), whose sum is σ = 2068984320. Its totient is φ = 1033975152.

The previous prime is 1551350459. The next prime is 1551350509. The reversal of 1551350481 is 1840531551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1551350481 - 2⁶ = 1551350417 is a prime.

It is a super-2 number, since 2×1551350481² = 4813376629797862722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1551350681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50161 + ... + 74958.

It is an arithmetic number, because the mean of its divisors is an integer number (258623040).

Almost surely, 2^1551350481 is an apocalyptic number.

It is an amenable number.

1551350481 is a deficient number, since it is larger than the sum of its proper divisors (517633839).

1551350481 is a wasteful number, since it uses less digits than its factorization.

1551350481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129255.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1551350481 is about 39387.1867616869. The cubic root of 1551350481 is about 1157.6305381408.

The spelling of 1551350481 in words is "one billion, five hundred fifty-one million, three hundred fifty thousand, four hundred eighty-one".