401213431 has 2 divisors, whose sum is σ = 401213432. Its totient is φ = 401213430.

The previous prime is 401213411. The next prime is 401213441. The reversal of 401213431 is 134312104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401213431 - 2⁵ = 401213399 is a prime.

It is a super-2 number, since 2×401213431² = 321944434429583522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401213399 and 401213408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401213401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200606715 + 200606716.

It is an arithmetic number, because the mean of its divisors is an integer number (200606716).

Almost surely, 2^401213431 is an apocalyptic number.

401213431 is a deficient number, since it is larger than the sum of its proper divisors (1).

401213431 is an equidigital number, since it uses as much as digits as its factorization.

401213431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 401213431 is about 20030.3128033488. The cubic root of 401213431 is about 737.5506006075.

Adding to 401213431 its reverse (134312104), we get a palindrome (535525535).

The spelling of 401213431 in words is "four hundred one million, two hundred thirteen thousand, four hundred thirty-one".