51308994 has 32 divisors (see below), whose sum is σ = 112207680. Its totient is φ = 15512000.

The previous prime is 51308993. The next prime is 51309017. The reversal of 51308994 is 49980315.

51308994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51308994² = 5265225730584072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51308993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45712 + ... + 46820.

It is an arithmetic number, because the mean of its divisors is an integer number (3506490).

Almost surely, 2^51308994 is an apocalyptic number.

51308994 is an abundant number, since it is smaller than the sum of its proper divisors (60898686).

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

51308994 is a wasteful number, since it uses less digits than its factorization.

51308994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 51308994 is about 7163.0296662795. The cubic root of 51308994 is about 371.5904122977.

The spelling of 51308994 in words is "fifty-one million, three hundred eight thousand, nine hundred ninety-four".