1401531431 has 2 divisors, whose sum is σ = 1401531432. Its totient is φ = 1401531430.

The previous prime is 1401531407. The next prime is 1401531437. The reversal of 1401531431 is 1341351041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401531431 - 2⁶ = 1401531367 is a prime.

It is a super-2 number, since 2×1401531431² = 3928580704161815522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401531397 and 1401531406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401531437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700765715 + 700765716.

It is an arithmetic number, because the mean of its divisors is an integer number (700765716).

Almost surely, 2^1401531431 is an apocalyptic number.

1401531431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401531431 is an equidigital number, since it uses as much as digits as its factorization.

1401531431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1401531431 is about 37437.0328818938. The cubic root of 1401531431 is about 1119.0966969929.

Adding to 1401531431 its reverse (1341351041), we get a palindrome (2742882472).

The spelling of 1401531431 in words is "one billion, four hundred one million, five hundred thirty-one thousand, four hundred thirty-one".