401540331 has 8 divisors (see below), whose sum is σ = 542164480. Its totient is φ = 264304872.

The previous prime is 401540329. The next prime is 401540383. The reversal of 401540331 is 133045104.

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

It is not a de Polignac number, because 401540331 - 2¹ = 401540329 is a prime.

It is a super-2 number, since 2×401540331² = 322469274839179122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401540298 and 401540307.

It is not an unprimeable number, because it can be changed into a prime (401544331) 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, 846895 + ... + 847368.

It is an arithmetic number, because the mean of its divisors is an integer number (67770560).

Almost surely, 2^401540331 is an apocalyptic number.

401540331 is a deficient number, since it is larger than the sum of its proper divisors (140624149).

401540331 is a wasteful number, since it uses less digits than its factorization.

401540331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694345.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 401540331 is about 20038.4712740269. The cubic root of 401540331 is about 737.7508596383.

Adding to 401540331 its reverse (133045104), we get a palindrome (534585435).

The spelling of 401540331 in words is "four hundred one million, five hundred forty thousand, three hundred thirty-one".