51463213542 has 64 divisors (see below), whose sum is σ = 123210178560. Its totient is φ = 15828361632.

The previous prime is 51463213541. The next prime is 51463213561. The reversal of 51463213542 is 24531236415.

51463213542 is a `hidden beast` number, since 5 + 1 + 4 + 632 + 13 + 5 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51463213497 and 51463213506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51463213541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1872633 + ... + 1899915.

It is an arithmetic number, because the mean of its divisors is an integer number (1925159040).

Almost surely, 2^51463213542 is an apocalyptic number.

51463213542 is an abundant number, since it is smaller than the sum of its proper divisors (71746965018).

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

51463213542 is a wasteful number, since it uses less digits than its factorization.

51463213542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29994 (or 29988 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 51463213542 its reverse (24531236415), we get a palindrome (75994449957).

The spelling of 51463213542 in words is "fifty-one billion, four hundred sixty-three million, two hundred thirteen thousand, five hundred forty-two".