43421320998 has 32 divisors (see below), whose sum is σ = 105263809920. Its totient is φ = 13157975880.

The previous prime is 43421320997. The next prime is 43421321003. The reversal of 43421320998 is 89902312434.

43421320998 is a `hidden beast` number, since 4 + 342 + 13 + 209 + 98 = 666.

It is a super-2 number, since 2×43421320998² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421320997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36549340 + ... + 36550527.

It is an arithmetic number, because the mean of its divisors is an integer number (3289494060).

Almost surely, 2^43421320998 is an apocalyptic number.

43421320998 is an abundant number, since it is smaller than the sum of its proper divisors (61842488922).

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

43421320998 is a wasteful number, since it uses less digits than its factorization.

43421320998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73099889 (or 73099883 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 43421320998 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty thousand, nine hundred ninety-eight".