51542004204 has 36 divisors (see below), whose sum is σ = 130294548384. Its totient is φ = 17179637472.

The previous prime is 51542004131. The next prime is 51542004209. The reversal of 51542004204 is 40240024515.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (51542004209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 783309 + ... + 846555.

Almost surely, 2^51542004204 is an apocalyptic number.

It is an amenable number.

51542004204 is an abundant number, since it is smaller than the sum of its proper divisors (78752544180).

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

51542004204 is a wasteful number, since it uses less digits than its factorization.

51542004204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85894 (or 85889 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 51542004204 its reverse (40240024515), we get a palindrome (91782028719).

The spelling of 51542004204 in words is "fifty-one billion, five hundred forty-two million, four thousand, two hundred four".