51543424452 has 48 divisors (see below), whose sum is σ = 129542662592. Its totient is φ = 15856663680.

The previous prime is 51543424421. The next prime is 51543424459. The reversal of 51543424452 is 25442434515.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 51543424452.

It is not an unprimeable number, because it can be changed into a prime (51543424459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942318 + ... + 995514.

Almost surely, 2^51543424452 is an apocalyptic number.

51543424452 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51543424452 is an abundant number, since it is smaller than the sum of its proper divisors (77999238140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51543424452 is a wasteful number, since it uses less digits than its factorization.

51543424452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59428 (or 59426 counting only the distinct ones).

The product of its digits is 384000, while the sum is 39.

Adding to 51543424452 its reverse (25442434515), we get a palindrome (76985858967).

The spelling of 51543424452 in words is "fifty-one billion, five hundred forty-three million, four hundred twenty-four thousand, four hundred fifty-two".