431401405 has 8 divisors (see below), whose sum is σ = 517959000. Its totient is φ = 344936256.

The previous prime is 431401393. The next prime is 431401417. The reversal of 431401405 is 504104134.

It is an interprime number because it is at equal distance from previous prime (431401393) and next prime (431401417).

It can be written as a sum of positive squares in 4 ways, for example, as 229249881 + 202151524 = 15141^2 + 14218^2 .

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 431401405 - 2¹¹ = 431399357 is a prime.

It is a super-2 number, since 2×431401405² = 372214344471948050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12390 + ... + 31879.

It is an arithmetic number, because the mean of its divisors is an integer number (64744875).

Almost surely, 2^431401405 is an apocalyptic number.

It is an amenable number.

431401405 is a deficient number, since it is larger than the sum of its proper divisors (86557595).

431401405 is a wasteful number, since it uses less digits than its factorization.

431401405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46223.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 431401405 is about 20770.2047414078. The cubic root of 431401405 is about 755.6033100063.

Adding to 431401405 its reverse (504104134), we get a palindrome (935505539).

The spelling of 431401405 in words is "four hundred thirty-one million, four hundred one thousand, four hundred five".