421533251002 has 4 divisors (see below), whose sum is σ = 632299876506. Its totient is φ = 210766625500.

The previous prime is 421533250997. The next prime is 421533251003. The reversal of 421533251002 is 200152335124.

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

It can be written as a sum of positive squares in only one way, i.e., 366871278601 + 54661972401 = 605699^2 + 233799^2 .

It is not an unprimeable number, because it can be changed into a prime (421533251003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105383312749 + ... + 105383312752.

Almost surely, 2^421533251002 is an apocalyptic number.

421533251002 is a deficient number, since it is larger than the sum of its proper divisors (210766625504).

421533251002 is a wasteful number, since it uses less digits than its factorization.

421533251002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210766625503.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 421533251002 its reverse (200152335124), we get a palindrome (621685586126).

The spelling of 421533251002 in words is "four hundred twenty-one billion, five hundred thirty-three million, two hundred fifty-one thousand, two".