51269000 has 64 divisors (see below), whose sum is σ = 121080960. Its totient is φ = 20318400.

The previous prime is 51268999. The next prime is 51269021. The reversal of 51269000 is 96215.

It is a super-2 number, since 2×51269000² = 5257020722000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 166847 + ... + 167153.

It is an arithmetic number, because the mean of its divisors is an integer number (1891890).

Almost surely, 2^51269000 is an apocalyptic number.

51269000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51269000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60540480).

51269000 is an abundant number, since it is smaller than the sum of its proper divisors (69811960).

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

51269000 is a wasteful number, since it uses less digits than its factorization.

51269000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51269000 is about 7160.2374262311. The cubic root of 51269000 is about 371.4938389109.

The spelling of 51269000 in words is "fifty-one million, two hundred sixty-nine thousand".