421520311652 has 24 divisors (see below), whose sum is σ = 810594479520. Its totient is φ = 190201597760.

The previous prime is 421520311649. The next prime is 421520311657. The reversal of 421520311652 is 256113025124.

It is not an unprimeable number, because it can be changed into a prime (421520311657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34957502 + ... + 34969557.

It is an arithmetic number, because the mean of its divisors is an integer number (33774769980).

Almost surely, 2^421520311652 is an apocalyptic number.

It is an amenable number.

421520311652 is a deficient number, since it is larger than the sum of its proper divisors (389074167868).

421520311652 is a wasteful number, since it uses less digits than its factorization.

421520311652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69927211 (or 69927209 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 421520311652 its reverse (256113025124), we get a palindrome (677633336776).

The spelling of 421520311652 in words is "four hundred twenty-one billion, five hundred twenty million, three hundred eleven thousand, six hundred fifty-two".