998212431 has 16 divisors (see below), whose sum is σ = 1394398208. Its totient is φ = 634392000.

The previous prime is 998212429. The next prime is 998212469. The reversal of 998212431 is 134212899.

It is not a de Polignac number, because 998212431 - 2¹ = 998212429 is a prime.

It is a super-2 number, since 2×998212431² = 1992856114805859522, which contains 22 as substring.

It is the 31595-th Hogben number.

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 998212431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998212421) by changing a digit.

It is a nontrivial repunit in base 31594.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73870 + ... + 86331.

It is an arithmetic number, because the mean of its divisors is an integer number (87149888).

Almost surely, 2^998212431 is an apocalyptic number.

998212431 is a deficient number, since it is larger than the sum of its proper divisors (396185777).

998212431 is a wasteful number, since it uses less digits than its factorization.

998212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160302.

The product of its digits is 31104, while the sum is 39.

The square root of 998212431 is about 31594.5000118692. The cubic root of 998212431 is about 999.4037882689.

The spelling of 998212431 in words is "nine hundred ninety-eight million, two hundred twelve thousand, four hundred thirty-one".