51140250 has 192 divisors, whose sum is σ = 168210432. Its totient is φ = 10944000.

The previous prime is 51140249. The next prime is 51140251. The reversal of 51140250 is 5204115.

It is an interprime number because it is at equal distance from previous prime (51140249) and next prime (51140251).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51140251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 267655 + ... + 267845.

It is an arithmetic number, because the mean of its divisors is an integer number (876096).

Almost surely, 2^51140250 is an apocalyptic number.

51140250 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 51140250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84105216).

51140250 is an abundant number, since it is smaller than the sum of its proper divisors (117070182).

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

51140250 is a wasteful number, since it uses less digits than its factorization.

51140250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51140250 is about 7151.2411510171. The cubic root of 51140250 is about 371.1826051862.

Adding to 51140250 its reverse (5204115), we get a palindrome (56344365).

The spelling of 51140250 in words is "fifty-one million, one hundred forty thousand, two hundred fifty".