1381441531 has 8 divisors (see below), whose sum is σ = 1485089280. Its totient is φ = 1280887848.

The previous prime is 1381441513. The next prime is 1381441543. The reversal of 1381441531 is 1351441831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381441531 is a prime.

It is a super-2 number, since 2×1381441531² = 3816761407143247922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381441493 and 1381441502.

It is not an unprimeable number, because it can be changed into a prime (1381441511) 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, 772591 + ... + 774376.

It is an arithmetic number, because the mean of its divisors is an integer number (185636160).

Almost surely, 2^1381441531 is an apocalyptic number.

1381441531 is a deficient number, since it is larger than the sum of its proper divisors (103647749).

1381441531 is a wasteful number, since it uses less digits than its factorization.

1381441531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547033.

The product of its digits is 5760, while the sum is 31.

The square root of 1381441531 is about 37167.7485328342. The cubic root of 1381441531 is about 1113.7238057395.

The spelling of 1381441531 in words is "one billion, three hundred eighty-one million, four hundred forty-one thousand, five hundred thirty-one".