51976405 has 8 divisors (see below), whose sum is σ = 67169592. Its totient is φ = 38382528.

The previous prime is 51976403. The next prime is 51976423. The reversal of 51976405 is 50467915.

It can be written as a sum of positive squares in 4 ways, for example, as 7273809 + 44702596 = 2697^2 + 6686^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51976405 - 2¹ = 51976403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51976403) 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, 399754 + ... + 399883.

It is an arithmetic number, because the mean of its divisors is an integer number (8396199).

Almost surely, 2^51976405 is an apocalyptic number.

It is an amenable number.

51976405 is a deficient number, since it is larger than the sum of its proper divisors (15193187).

51976405 is a wasteful number, since it uses less digits than its factorization.

51976405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799655.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 51976405 is about 7209.4663464087. The cubic root of 51976405 is about 373.1946529096.

The spelling of 51976405 in words is "fifty-one million, nine hundred seventy-six thousand, four hundred five".