51450642 has 12 divisors (see below), whose sum is σ = 111476430. Its totient is φ = 17150208.

The previous prime is 51450601. The next prime is 51450649. The reversal of 51450642 is 24605415.

51450642 is a `hidden beast` number, since 5 + 14 + 5 + 0 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28611801 + 22838841 = 5349^2 + 4779^2 .

It is not an unprimeable number, because it can be changed into a prime (51450649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1429167 + ... + 1429202.

Almost surely, 2^51450642 is an apocalyptic number.

51450642 is an abundant number, since it is smaller than the sum of its proper divisors (60025788).

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

51450642 is a wasteful number, since it uses less digits than its factorization.

51450642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858377 (or 2858374 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51450642 is about 7172.9102880212. The cubic root of 51450642 is about 371.9320462070.

The spelling of 51450642 in words is "fifty-one million, four hundred fifty thousand, six hundred forty-two".