202421304432431 has 4 divisors (see below), whose sum is σ = 231338633637072. Its totient is φ = 173503975227792.

The previous prime is 202421304432427. The next prime is 202421304432439. The reversal of 202421304432431 is 134234403124202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 202421304432431 - 2² = 202421304432427 is a prime.

It is a super-2 number, since 2×202421304432431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202421304432391 and 202421304432400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202421304432439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14458664602310 + ... + 14458664602323.

It is an arithmetic number, because the mean of its divisors is an integer number (57834658409268).

Almost surely, 2^{202421304432431} is an apocalyptic number.

202421304432431 is a deficient number, since it is larger than the sum of its proper divisors (28917329204641).

202421304432431 is an equidigital number, since it uses as much as digits as its factorization.

202421304432431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28917329204640.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 202421304432431 its reverse (134234403124202), we get a palindrome (336655707556633).

The spelling of 202421304432431 in words is "two hundred two trillion, four hundred twenty-one billion, three hundred four million, four hundred thirty-two thousand, four hundred thirty-one".