1381853331 has 8 divisors (see below), whose sum is σ = 2047190160. Its totient is φ = 921235536.

The previous prime is 1381853311. The next prime is 1381853351. The reversal of 1381853331 is 1333581831.

It is a happy number.

1381853331 is a `hidden beast` number, since 13 + 81 + 8 + 533 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (1381853311) and next prime (1381853351).

It is not a de Polignac number, because 1381853331 - 2⁹ = 1381852819 is a prime.

It is a super-2 number, since 2×1381853331² = 3819037256791591122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1381853311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25589850 + ... + 25589903.

It is an arithmetic number, because the mean of its divisors is an integer number (255898770).

Almost surely, 2^1381853331 is an apocalyptic number.

1381853331 is a deficient number, since it is larger than the sum of its proper divisors (665336829).

1381853331 is an equidigital number, since it uses as much as digits as its factorization.

1381853331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51179762 (or 51179756 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1381853331 is about 37173.2878691138. The cubic root of 1381853331 is about 1113.8344596925.

The spelling of 1381853331 in words is "one billion, three hundred eighty-one million, eight hundred fifty-three thousand, three hundred thirty-one".