1431232655 has 4 divisors (see below), whose sum is σ = 1717479192. Its totient is φ = 1144986120.

The previous prime is 1431232639. The next prime is 1431232657. The reversal of 1431232655 is 5562321341.

It is a happy number.

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

It is not a de Polignac number, because 1431232655 - 2⁴ = 1431232639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431232657) 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, 143123261 + ... + 143123270.

It is an arithmetic number, because the mean of its divisors is an integer number (429369798).

Almost surely, 2^1431232655 is an apocalyptic number.

1431232655 is a deficient number, since it is larger than the sum of its proper divisors (286246537).

1431232655 is an equidigital number, since it uses as much as digits as its factorization.

1431232655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286246536.

The product of its digits is 21600, while the sum is 32.

The square root of 1431232655 is about 37831.6356373869. The cubic root of 1431232655 is about 1126.9467934435.

Adding to 1431232655 its reverse (5562321341), we get a palindrome (6993553996).

The spelling of 1431232655 in words is "one billion, four hundred thirty-one million, two hundred thirty-two thousand, six hundred fifty-five".