1331402553 has 24 divisors (see below), whose sum is σ = 2121592200. Its totient is φ = 799338240.

The previous prime is 1331402551. The next prime is 1331402573. The reversal of 1331402553 is 3552041331.

It can be written as a sum of positive squares in 4 ways, for example, as 85877289 + 1245525264 = 9267^2 + 35292^2 .

It is not a de Polignac number, because 1331402553 - 2¹ = 1331402551 is a prime.

It is a super-3 number, since 3×1331402553³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1331402551) 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 23 ways as a sum of consecutive naturals, for example, 133978 + ... + 143571.

It is an arithmetic number, because the mean of its divisors is an integer number (88399675).

Almost surely, 2^1331402553 is an apocalyptic number.

1331402553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1331402553 is a deficient number, since it is larger than the sum of its proper divisors (790189647).

1331402553 is a wasteful number, since it uses less digits than its factorization.

1331402553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277609 (or 277606 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1331402553 is about 36488.3892902934. The cubic root of 1331402553 is about 1100.1108849652.

Adding to 1331402553 its reverse (3552041331), we get a palindrome (4883443884).

The spelling of 1331402553 in words is "one billion, three hundred thirty-one million, four hundred two thousand, five hundred fifty-three".