51405468 has 24 divisors (see below), whose sum is σ = 122736768. Its totient is φ = 16736496.

The previous prime is 51405463. The next prime is 51405479. The reversal of 51405468 is 86450415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405463) 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, 49296 + ... + 50327.

It is an arithmetic number, because the mean of its divisors is an integer number (5114032).

Almost surely, 2^51405468 is an apocalyptic number.

It is an amenable number.

51405468 is an abundant number, since it is smaller than the sum of its proper divisors (71331300).

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

51405468 is a wasteful number, since it uses less digits than its factorization.

51405468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99673 (or 99671 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 51405468 is about 7169.7606654616. The cubic root of 51405468 is about 371.8231614110.

The spelling of 51405468 in words is "fifty-one million, four hundred five thousand, four hundred sixty-eight".