51086550 has 24 divisors (see below), whose sum is σ = 126695016. Its totient is φ = 13623040.

The previous prime is 51086549. The next prime is 51086551. The reversal of 51086550 is 5568015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51086549) and next prime (51086551).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170139 + ... + 170438.

It is an arithmetic number, because the mean of its divisors is an integer number (5278959).

Almost surely, 2^51086550 is an apocalyptic number.

51086550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51086550 is an abundant number, since it is smaller than the sum of its proper divisors (75608466).

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

51086550 is a wasteful number, since it uses less digits than its factorization.

51086550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340592 (or 340587 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 51086550 is about 7147.4855718637. The cubic root of 51086550 is about 371.0526391503.

The spelling of 51086550 in words is "fifty-one million, eighty-six thousand, five hundred fifty".