51450064 has 10 divisors (see below), whose sum is σ = 99684530. Its totient is φ = 25725024.

The previous prime is 51450053. The next prime is 51450067. The reversal of 51450064 is 46005415.

It can be written as a sum of positive squares in only one way, i.e., 34574400 + 16875664 = 5880^2 + 4108^2 .

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51450067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607799 + ... + 1607830.

It is an arithmetic number, because the mean of its divisors is an integer number (9968453).

Almost surely, 2^51450064 is an apocalyptic number.

It is an amenable number.

51450064 is a deficient number, since it is larger than the sum of its proper divisors (48234466).

51450064 is a wasteful number, since it uses less digits than its factorization.

51450064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215637 (or 3215631 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51450064 is about 7172.8699974278. The cubic root of 51450064 is about 371.9306534319.

Adding to 51450064 its reverse (46005415), we get a palindrome (97455479).

The spelling of 51450064 in words is "fifty-one million, four hundred fifty thousand, sixty-four".