403825681 has 8 divisors (see below), whose sum is σ = 461643840. Its totient is φ = 346039728.

The previous prime is 403825657. The next prime is 403825693. The reversal of 403825681 is 186528304.

It is a happy number.

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 403825681 - 2⁵ = 403825649 is a prime.

It is a super-2 number, since 2×403825681² = 326150361270227522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 403825681.

It is not an unprimeable number, because it can be changed into a prime (403825181) 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, 32355 + ... + 43063.

It is an arithmetic number, because the mean of its divisors is an integer number (57705480).

Almost surely, 2^403825681 is an apocalyptic number.

It is an amenable number.

403825681 is a deficient number, since it is larger than the sum of its proper divisors (57818159).

403825681 is a wasteful number, since it uses less digits than its factorization.

403825681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16103.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 403825681 is about 20095.4144271772. The cubic root of 403825681 is about 739.1478387521.

The spelling of 403825681 in words is "four hundred three million, eight hundred twenty-five thousand, six hundred eighty-one".