1400312631 has 4 divisors (see below), whose sum is σ = 1867083512. Its totient is φ = 933541752.

The previous prime is 1400312621. The next prime is 1400312651. The reversal of 1400312631 is 1362130041.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1400312631 - 2²¹ = 1398215479 is a prime.

It is a super-2 number, since 2×1400312631² = 3921750929076284322, 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 = 1400312598 and 1400312607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400312621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233385436 + ... + 233385441.

It is an arithmetic number, because the mean of its divisors is an integer number (466770878).

Almost surely, 2^1400312631 is an apocalyptic number.

1400312631 is a deficient number, since it is larger than the sum of its proper divisors (466770881).

1400312631 is an equidigital number, since it uses as much as digits as its factorization.

1400312631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466770880.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1400312631 is about 37420.7513420027. The cubic root of 1400312631 is about 1118.7722065607.

Adding to 1400312631 its reverse (1362130041), we get a palindrome (2762442672).

The spelling of 1400312631 in words is "one billion, four hundred million, three hundred twelve thousand, six hundred thirty-one".