1491982431 has 16 divisors (see below), whose sum is σ = 2001103104. Its totient is φ = 988775424.

The previous prime is 1491982417. The next prime is 1491982433. The reversal of 1491982431 is 1342891941.

It is not a de Polignac number, because 1491982431 - 2⁵ = 1491982399 is a prime.

It is a super-2 number, since 2×1491982431² = 4452023148825339522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491982433) 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 15 ways as a sum of consecutive naturals, for example, 429855 + ... + 433311.

It is an arithmetic number, because the mean of its divisors is an integer number (125068944).

Almost surely, 2^1491982431 is an apocalyptic number.

1491982431 is a deficient number, since it is larger than the sum of its proper divisors (509120673).

1491982431 is a wasteful number, since it uses less digits than its factorization.

1491982431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270.

The product of its digits is 62208, while the sum is 42.

The square root of 1491982431 is about 38626.1884089021. The cubic root of 1491982431 is about 1142.6710811930.

The spelling of 1491982431 in words is "one billion, four hundred ninety-one million, nine hundred eighty-two thousand, four hundred thirty-one".