1431431221398 has 16 divisors (see below), whose sum is σ = 2923774410240. Its totient is φ = 466991745896.

The previous prime is 1431431221361. The next prime is 1431431221453. The reversal of 1431431221398 is 8931221341341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537998338 + ... + 2537998901.

It is an arithmetic number, because the mean of its divisors is an integer number (182735900640).

Almost surely, 2^{1431431221398} is an apocalyptic number.

1431431221398 is an abundant number, since it is smaller than the sum of its proper divisors (1492343188842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1431431221398 is a wasteful number, since it uses less digits than its factorization.

1431431221398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075997291.

The product of its digits is 124416, while the sum is 42.

The spelling of 1431431221398 in words is "one trillion, four hundred thirty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, three hundred ninety-eight".