1630172100 has 36 divisors (see below), whose sum is σ = 4716632144. Its totient is φ = 434712480.

The previous prime is 1630172087. The next prime is 1630172171. The reversal of 1630172100 is 12710361.

It is a super-2 number, since 2×1630172100² = 5314922151236820000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2716654 + ... + 2717253.

Almost surely, 2^1630172100 is an apocalyptic number.

1630172100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630172100 is an abundant number, since it is smaller than the sum of its proper divisors (3086460044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1630172100 is a wasteful number, since it uses less digits than its factorization.

1630172100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433924 (or 5433917 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1630172100 is about 40375.3897814003. The cubic root of 1630172100 is about 1176.9133395948.

Adding to 1630172100 its reverse (12710361), we get a palindrome (1642882461).

The spelling of 1630172100 in words is "one billion, six hundred thirty million, one hundred seventy-two thousand, one hundred".