1681421010 has 16 divisors (see below), whose sum is σ = 4035410496. Its totient is φ = 448378928.

The previous prime is 1681420931. The next prime is 1681421041. The reversal of 1681421010 is 101241861.

It is a super-2 number, since 2×1681421010² = 5654353225738840200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28023654 + ... + 28023713.

It is an arithmetic number, because the mean of its divisors is an integer number (252213156).

Almost surely, 2^1681421010 is an apocalyptic number.

1681421010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1681421010 is an abundant number, since it is smaller than the sum of its proper divisors (2353989486).

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

1681421010 is a wasteful number, since it uses less digits than its factorization.

1681421010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56047377.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1681421010 is about 41005.1339468608. The cubic root of 1681421010 is about 1189.1194696093.

Adding to 1681421010 its reverse (101241861), we get a palindrome (1782662871).

The spelling of 1681421010 in words is "one billion, six hundred eighty-one million, four hundred twenty-one thousand, ten".