1681359031 has 8 divisors (see below), whose sum is σ = 1834542864. Its totient is φ = 1528230720.

The previous prime is 1681358999. The next prime is 1681359079. The reversal of 1681359031 is 1309531861.

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 1681359031 - 2⁵ = 1681358999 is a prime.

It is a super-2 number, since 2×1681359031² = 5653936382250517922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681359091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73261 + ... + 93433.

It is an arithmetic number, because the mean of its divisors is an integer number (229317858).

Almost surely, 2^1681359031 is an apocalyptic number.

1681359031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1681359031 is a deficient number, since it is larger than the sum of its proper divisors (153183833).

1681359031 is a wasteful number, since it uses less digits than its factorization.

1681359031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27761.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1681359031 is about 41004.3781930662. The cubic root of 1681359031 is about 1189.1048586858.

The spelling of 1681359031 in words is "one billion, six hundred eighty-one million, three hundred fifty-nine thousand, thirty-one".