51290064 has 120 divisors (see below), whose sum is σ = 171328320. Its totient is φ = 14648256.

The previous prime is 51290053. The next prime is 51290119. The reversal of 51290064 is 46009215.

51290064 is a `hidden beast` number, since 512 + 90 + 0 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19957 + ... + 22379.

It is an arithmetic number, because the mean of its divisors is an integer number (1427736).

Almost surely, 2^51290064 is an apocalyptic number.

51290064 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51290064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85664160).

51290064 is an abundant number, since it is smaller than the sum of its proper divisors (120038256).

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

51290064 is a wasteful number, since it uses less digits than its factorization.

51290064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51290064 is about 7161.7081761267. The cubic root of 51290064 is about 371.5447083434.

Adding to 51290064 its reverse (46009215), we get a palindrome (97299279).

The spelling of 51290064 in words is "fifty-one million, two hundred ninety thousand, sixty-four".