421504012551 has 8 divisors (see below), whose sum is σ = 568776499200. Its totient is φ = 277617100472.

The previous prime is 421504012519. The next prime is 421504012609. The reversal of 421504012551 is 155210405124.

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 421504012551 - 2⁵ = 421504012519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421504012651) 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, 846393351 + ... + 846393848.

It is an arithmetic number, because the mean of its divisors is an integer number (71097062400).

Almost surely, 2^421504012551 is an apocalyptic number.

421504012551 is a deficient number, since it is larger than the sum of its proper divisors (147272486649).

421504012551 is a wasteful number, since it uses less digits than its factorization.

421504012551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692787285.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 421504012551 its reverse (155210405124), we get a palindrome (576714417675).

The spelling of 421504012551 in words is "four hundred twenty-one billion, five hundred four million, twelve thousand, five hundred fifty-one".