1631016 has 48 divisors (see below), whose sum is σ = 4586400. Its totient is φ = 543024.

The previous prime is 1630987. The next prime is 1631023. The reversal of 1631016 is 6101361.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1631016.

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, 1525 + ... + 2363.

It is an arithmetic number, because the mean of its divisors is an integer number (95550).

2^1631016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2293200).

1631016 is an abundant number, since it is smaller than the sum of its proper divisors (2955384).

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

1631016 is an equidigital number, since it uses as much as digits as its factorization.

1631016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1631016 is about 1277.1123678048. The cubic root of 1631016 is about 117.7116390923.

Adding to 1631016 its reverse (6101361), we get a palindrome (7732377).

The spelling of 1631016 in words is "one million, six hundred thirty-one thousand, sixteen".