51421308 has 24 divisors (see below), whose sum is σ = 121150848. Its totient is φ = 16973616.

The previous prime is 51421303. The next prime is 51421313. The reversal of 51421308 is 80312415.

It is an interprime number because it is at equal distance from previous prime (51421303) and next prime (51421313).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421303) 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, 19566 + ... + 22037.

It is an arithmetic number, because the mean of its divisors is an integer number (5047952).

Almost surely, 2^51421308 is an apocalyptic number.

It is an amenable number.

51421308 is an abundant number, since it is smaller than the sum of its proper divisors (69729540).

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

51421308 is a wasteful number, since it uses less digits than its factorization.

51421308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41713 (or 41711 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51421308 is about 7170.8652197625. The cubic root of 51421308 is about 371.8613484902.

The spelling of 51421308 in words is "fifty-one million, four hundred twenty-one thousand, three hundred eight".