51163750 has 60 divisors (see below), whose sum is σ = 106362828. Its totient is φ = 18300000.

The previous prime is 51163741. The next prime is 51163759. The reversal of 51163750 is 5736115.

It is an interprime number because it is at equal distance from previous prime (51163741) and next prime (51163759).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51163759) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 838720 + ... + 838780.

Almost surely, 2^51163750 is an apocalyptic number.

51163750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51163750 is an abundant number, since it is smaller than the sum of its proper divisors (55199078).

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

51163750 is an equidigital number, since it uses as much as digits as its factorization.

51163750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 51163750 is about 7152.8840337307. The cubic root of 51163750 is about 371.2394518348.

Adding to 51163750 its reverse (5736115), we get a palindrome (56899865).

It can be divided in two parts, 511 and 63750, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 51163750 in words is "fifty-one million, one hundred sixty-three thousand, seven hundred fifty".