51455250 has 288 divisors, whose sum is σ = 181254528. Its totient is φ = 10692000.

The previous prime is 51455237. The next prime is 51455267. The reversal of 51455250 is 5255415.

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 143 ways as a sum of consecutive naturals, for example, 4677745 + ... + 4677755.

It is an arithmetic number, because the mean of its divisors is an integer number (629356).

Almost surely, 2^51455250 is an apocalyptic number.

51455250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51455250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90627264).

51455250 is an abundant number, since it is smaller than the sum of its proper divisors (129799278).

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

51455250 is a wasteful number, since it uses less digits than its factorization.

51455250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 51455250 is about 7173.2314893638. The cubic root of 51455250 is about 371.9431494809.

The spelling of 51455250 in words is "fifty-one million, four hundred fifty-five thousand, two hundred fifty".