421534133151 has 4 divisors (see below), whose sum is σ = 562045510872. Its totient is φ = 281022755432.

The previous prime is 421534133117. The next prime is 421534133173. The reversal of 421534133151 is 151331435124.

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 421534133151 - 2²¹ = 421532035999 is a prime.

It is a super-2 number, since 2×421534133151² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421534133191) 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, 70255688856 + ... + 70255688861.

It is an arithmetic number, because the mean of its divisors is an integer number (140511377718).

Almost surely, 2^421534133151 is an apocalyptic number.

421534133151 is a deficient number, since it is larger than the sum of its proper divisors (140511377721).

421534133151 is a wasteful number, since it uses less digits than its factorization.

421534133151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140511377720.

The product of its digits is 21600, while the sum is 33.

Adding to 421534133151 its reverse (151331435124), we get a palindrome (572865568275).

The spelling of 421534133151 in words is "four hundred twenty-one billion, five hundred thirty-four million, one hundred thirty-three thousand, one hundred fifty-one".