1400166431 has 4 divisors (see below), whose sum is σ = 1403492664. Its totient is φ = 1396840200.

The previous prime is 1400166407. The next prime is 1400166463. The reversal of 1400166431 is 1346610041.

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

It is a cyclic number.

It is not a de Polignac number, because 1400166431 - 2³⁰ = 326424607 is a prime.

It is a super-2 number, since 2×1400166431² = 3920932068998555522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1400166431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400166401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662485 + ... + 1663326.

It is an arithmetic number, because the mean of its divisors is an integer number (350873166).

Almost surely, 2^1400166431 is an apocalyptic number.

1400166431 is a deficient number, since it is larger than the sum of its proper divisors (3326233).

1400166431 is an equidigital number, since it uses as much as digits as its factorization.

1400166431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326232.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1400166431 is about 37418.7978294333. The cubic root of 1400166431 is about 1118.7332699723.

Adding to 1400166431 its reverse (1346610041), we get a palindrome (2746776472).

The spelling of 1400166431 in words is "one billion, four hundred million, one hundred sixty-six thousand, four hundred thirty-one".