51129496 has 32 divisors (see below), whose sum is σ = 105371280. Its totient is φ = 23065600.

The previous prime is 51129493. The next prime is 51129497. The reversal of 51129496 is 69492115.

It is a super-2 number, since 2×51129496² = 5228450722428032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51129493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9936 + ... + 14176.

Almost surely, 2^51129496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51129496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52685640).

51129496 is an abundant number, since it is smaller than the sum of its proper divisors (54241784).

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

51129496 is a wasteful number, since it uses less digits than its factorization.

51129496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4391 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 51129496 is about 7150.4892140328. The cubic root of 51129496 is about 371.1565853840.

The spelling of 51129496 in words is "fifty-one million, one hundred twenty-nine thousand, four hundred ninety-six".