1401333231 has 16 divisors (see below), whose sum is σ = 1893415680. Its totient is φ = 921802560.

The previous prime is 1401333209. The next prime is 1401333233. The reversal of 1401333231 is 1323331041.

It is not a de Polignac number, because 1401333231 - 2²¹ = 1399236079 is a prime.

It is a super-2 number, since 2×1401333231² = 3927469648609798722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401333198 and 1401333207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401333233) 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, 78760 + ... + 94898.

It is an arithmetic number, because the mean of its divisors is an integer number (118338480).

Almost surely, 2^1401333231 is an apocalyptic number.

1401333231 is a deficient number, since it is larger than the sum of its proper divisors (492082449).

1401333231 is a wasteful number, since it uses less digits than its factorization.

1401333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16526.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1401333231 is about 37434.3856768079. The cubic root of 1401333231 is about 1119.0439415054.

Adding to 1401333231 its reverse (1323331041), we get a palindrome (2724664272).

The spelling of 1401333231 in words is "one billion, four hundred one million, three hundred thirty-three thousand, two hundred thirty-one".