1630621223 has 16 divisors (see below), whose sum is σ = 2034754560. Its totient is φ = 1269506400.

The previous prime is 1630621219. The next prime is 1630621229. The reversal of 1630621223 is 3221260361.

It is a cyclic number.

It is not a de Polignac number, because 1630621223 - 2² = 1630621219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630621192 and 1630621201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630621229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86018 + ... + 103248.

It is an arithmetic number, because the mean of its divisors is an integer number (127172160).

Almost surely, 2^1630621223 is an apocalyptic number.

1630621223 is a deficient number, since it is larger than the sum of its proper divisors (404133337).

1630621223 is a wasteful number, since it uses less digits than its factorization.

1630621223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18478.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1630621223 is about 40380.9512394149. The cubic root of 1630621223 is about 1177.0214120932.

Adding to 1630621223 its reverse (3221260361), we get a palindrome (4851881584).

The spelling of 1630621223 in words is "one billion, six hundred thirty million, six hundred twenty-one thousand, two hundred twenty-three".