51420336 has 40 divisors (see below), whose sum is σ = 144913344. Its totient is φ = 15581760.

The previous prime is 51420331. The next prime is 51420337. The reversal of 51420336 is 63302415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51420331) 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, 48166 + ... + 49221.

Almost surely, 2^51420336 is an apocalyptic number.

It is an amenable number.

51420336 is an abundant number, since it is smaller than the sum of its proper divisors (93493008).

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

51420336 is a wasteful number, since it uses less digits than its factorization.

51420336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97409 (or 97403 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 51420336 is about 7170.7974451939. The cubic root of 51420336 is about 371.8590054180.

The spelling of 51420336 in words is "fifty-one million, four hundred twenty thousand, three hundred thirty-six".