1333145561 has 16 divisors (see below), whose sum is σ = 1478288448. Its totient is φ = 1192152000.

The previous prime is 1333145551. The next prime is 1333145579. The reversal of 1333145561 is 1655413331.

It is a cyclic number.

It is not a de Polignac number, because 1333145561 - 2⁶ = 1333145497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1333145521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170606 + ... + 178248.

It is an arithmetic number, because the mean of its divisors is an integer number (92393028).

Almost surely, 2^1333145561 is an apocalyptic number.

1333145561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1333145561 is a deficient number, since it is larger than the sum of its proper divisors (145142887).

1333145561 is a wasteful number, since it uses less digits than its factorization.

1333145561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912.

The product of its digits is 16200, while the sum is 32.

The square root of 1333145561 is about 36512.2658979144. The cubic root of 1333145561 is about 1100.5907463239.

Adding to 1333145561 its reverse (1655413331), we get a palindrome (2988558892).

The spelling of 1333145561 in words is "one billion, three hundred thirty-three million, one hundred forty-five thousand, five hundred sixty-one".