1631430513 has 6 divisors (see below), whose sum is σ = 2356510754. Its totient is φ = 1087620336.

The previous prime is 1631430439. The next prime is 1631430533. The reversal of 1631430513 is 3150341361.

1631430513 is a `hidden beast` number, since 1 + 6 + 3 + 143 + 0 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1000014129 + 631416384 = 31623^2 + 25128^2 .

It is not a de Polignac number, because 1631430513 - 2⁹ = 1631430001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631430533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90635020 + ... + 90635037.

Almost surely, 2^1631430513 is an apocalyptic number.

It is an amenable number.

1631430513 is a deficient number, since it is larger than the sum of its proper divisors (725080241).

1631430513 is a wasteful number, since it uses less digits than its factorization.

1631430513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181270063 (or 181270060 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1631430513 is about 40390.9706865284. The cubic root of 1631430513 is about 1177.2161015164.

Adding to 1631430513 its reverse (3150341361), we get a palindrome (4781771874).

The spelling of 1631430513 in words is "one billion, six hundred thirty-one million, four hundred thirty thousand, five hundred thirteen".