421521514424 has 8 divisors (see below), whose sum is σ = 790352839560. Its totient is φ = 210760757208.

The previous prime is 421521514423. The next prime is 421521514489. The reversal of 421521514424 is 424415125124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421521514423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26345094644 + ... + 26345094659.

It is an arithmetic number, because the mean of its divisors is an integer number (98794104945).

Almost surely, 2^421521514424 is an apocalyptic number.

It is an amenable number.

421521514424 is a deficient number, since it is larger than the sum of its proper divisors (368831325136).

421521514424 is a wasteful number, since it uses less digits than its factorization.

421521514424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52690189309 (or 52690189305 counting only the distinct ones).

The product of its digits is 51200, while the sum is 35.

Adding to 421521514424 its reverse (424415125124), we get a palindrome (845936639548).

The spelling of 421521514424 in words is "four hundred twenty-one billion, five hundred twenty-one million, five hundred fourteen thousand, four hundred twenty-four".