3996551 has 16 divisors (see below), whose sum is σ = 4558848. Its totient is φ = 3477600.

The previous prime is 3996541. The next prime is 3996569. The reversal of 3996551 is 1556993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3996551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996511) 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, 18836 + ... + 19046.

It is an arithmetic number, because the mean of its divisors is an integer number (284928).

Almost surely, 2^3996551 is an apocalyptic number.

3996551 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3996551 is a deficient number, since it is larger than the sum of its proper divisors (562297).

3996551 is a wasteful number, since it uses less digits than its factorization.

3996551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its digits is 36450, while the sum is 38.

The square root of 3996551 is about 1999.1375640511. The cubic root of 3996551 is about 158.6944675254.

The spelling of 3996551 in words is "three million, nine hundred ninety-six thousand, five hundred fifty-one".