1631212113 has 8 divisors (see below), whose sum is σ = 2184448000. Its totient is φ = 1082725488.

The previous prime is 1631212069. The next prime is 1631212129. The reversal of 1631212113 is 3112121361.

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

It is not a de Polignac number, because 1631212113 - 2¹² = 1631208017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1631212113.

It is not an unprimeable number, because it can be changed into a prime (1631212013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186513 + ... + 1187886.

It is an arithmetic number, because the mean of its divisors is an integer number (273056000).

Almost surely, 2^1631212113 is an apocalyptic number.

It is an amenable number.

1631212113 is a deficient number, since it is larger than the sum of its proper divisors (553235887).

1631212113 is a wasteful number, since it uses less digits than its factorization.

1631212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374631.

The product of its digits is 216, while the sum is 21.

The square root of 1631212113 is about 40388.2670215002. The cubic root of 1631212113 is about 1177.1635677700.

Adding to 1631212113 its reverse (3112121361), we get a palindrome (4743333474).

The spelling of 1631212113 in words is "one billion, six hundred thirty-one million, two hundred twelve thousand, one hundred thirteen".