421524354551 has 8 divisors (see below), whose sum is σ = 434457544944. Its totient is φ = 408672250560.

The previous prime is 421524354547. The next prime is 421524354613. The reversal of 421524354551 is 155453425124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421524354551 - 2² = 421524354547 is a prime.

It is a super-4 number, since 4×421524354551⁴ (a number of 48 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421524354499 and 421524354508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421524354521) 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, 20261045 + ... + 20281838.

It is an arithmetic number, because the mean of its divisors is an integer number (54307193118).

Almost surely, 2^421524354551 is an apocalyptic number.

421524354551 is a deficient number, since it is larger than the sum of its proper divisors (12933190393).

421524354551 is a wasteful number, since it uses less digits than its factorization.

421524354551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40543201.

The product of its digits is 480000, while the sum is 41.

Adding to 421524354551 its reverse (155453425124), we get a palindrome (576977779675).

The spelling of 421524354551 in words is "four hundred twenty-one billion, five hundred twenty-four million, three hundred fifty-four thousand, five hundred fifty-one".