401210531 has 2 divisors, whose sum is σ = 401210532. Its totient is φ = 401210530.

The previous prime is 401210521. The next prime is 401210533. The reversal of 401210531 is 135012104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401210531 - 2²² = 397016227 is a prime.

It is a super-2 number, since 2×401210531² = 321939780370603922, which contains 22 as substring.

Together with 401210533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401210533) 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, 200605265 + 200605266.

It is an arithmetic number, because the mean of its divisors is an integer number (200605266).

Almost surely, 2^401210531 is an apocalyptic number.

401210531 is a deficient number, since it is larger than the sum of its proper divisors (1).

401210531 is an equidigital number, since it uses as much as digits as its factorization.

401210531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 401210531 is about 20030.2404129356. The cubic root of 401210531 is about 737.5488235800.

Adding to 401210531 its reverse (135012104), we get a palindrome (536222635).

The spelling of 401210531 in words is "four hundred one million, two hundred ten thousand, five hundred thirty-one".