51979356 has 144 divisors (see below), whose sum is σ = 161441280. Its totient is φ = 13875840.

The previous prime is 51979351. The next prime is 51979357. The reversal of 51979356 is 65397915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51979351) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 118185 + ... + 118623.

It is an arithmetic number, because the mean of its divisors is an integer number (1121120).

Almost surely, 2^51979356 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 51979356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80720640).

51979356 is an abundant number, since it is smaller than the sum of its proper divisors (109461924).

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

51979356 is a wasteful number, since it uses less digits than its factorization.

51979356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 491 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 51979356 is about 7209.6710049766. The cubic root of 51979356 is about 373.2017155796.

The spelling of 51979356 in words is "fifty-one million, nine hundred seventy-nine thousand, three hundred fifty-six".