1630442231 has 8 divisors (see below), whose sum is σ = 1872278400. Its totient is φ = 1404208440.

The previous prime is 1630442213. The next prime is 1630442243. The reversal of 1630442231 is 1322440361.

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

It is a cyclic number.

It is not a de Polignac number, because 1630442231 - 2²² = 1626247927 is a prime.

It is a super-2 number, since 2×1630442231² = 5316683737256514722, which contains 22 as substring.

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 1630442231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630442201) 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 7 ways as a sum of consecutive naturals, for example, 3900371 + ... + 3900788.

It is an arithmetic number, because the mean of its divisors is an integer number (234034800).

Almost surely, 2^1630442231 is an apocalyptic number.

1630442231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1630442231 is a deficient number, since it is larger than the sum of its proper divisors (241836169).

1630442231 is a wasteful number, since it uses less digits than its factorization.

1630442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801189.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1630442231 is about 40378.7348860759. The cubic root of 1630442231 is about 1176.9783436146.

Adding to 1630442231 its reverse (1322440361), we get a palindrome (2952882592).

The spelling of 1630442231 in words is "one billion, six hundred thirty million, four hundred forty-two thousand, two hundred thirty-one".