51403128 has 32 divisors (see below), whose sum is σ = 146866560. Its totient is φ = 14686560.

The previous prime is 51403127. The next prime is 51403129. The reversal of 51403128 is 82130415.

It is an interprime number because it is at equal distance from previous prime (51403127) and next prime (51403129).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 51403098 and 51403107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51403127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152818 + ... + 153153.

It is an arithmetic number, because the mean of its divisors is an integer number (4589580).

Almost surely, 2^51403128 is an apocalyptic number.

It is an amenable number.

51403128 is an abundant number, since it is smaller than the sum of its proper divisors (95463432).

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

51403128 is a wasteful number, since it uses less digits than its factorization.

51403128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305987 (or 305983 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51403128 is about 7169.5974782410. The cubic root of 51403128 is about 371.8175194729.

The spelling of 51403128 in words is "fifty-one million, four hundred three thousand, one hundred twenty-eight".