401333261 has 8 divisors (see below), whose sum is σ = 458889024. Its totient is φ = 343833120.

The previous prime is 401333249. The next prime is 401333293. The reversal of 401333261 is 162333104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401333261 is a prime.

It is a super-2 number, since 2×401333261² = 322136772769788242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401333201) 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, 2921 + ... + 28481.

It is an arithmetic number, because the mean of its divisors is an integer number (57361128).

Almost surely, 2^401333261 is an apocalyptic number.

It is an amenable number.

401333261 is a deficient number, since it is larger than the sum of its proper divisors (57555763).

401333261 is a wasteful number, since it uses less digits than its factorization.

401333261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27811.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 401333261 is about 20033.3037964286. The cubic root of 401333261 is about 737.6240211232.

Adding to 401333261 its reverse (162333104), we get a palindrome (563666365).

The spelling of 401333261 in words is "four hundred one million, three hundred thirty-three thousand, two hundred sixty-one".