51420300 has 36 divisors (see below), whose sum is σ = 148776936. Its totient is φ = 13712000.

The previous prime is 51420293. The next prime is 51420301. The reversal of 51420300 is 302415.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 51420300.

It is not an unprimeable number, because it can be changed into a prime (51420301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85401 + ... + 86000.

Almost surely, 2^51420300 is an apocalyptic number.

51420300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51420300 is an abundant number, since it is smaller than the sum of its proper divisors (97356636).

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

51420300 is a wasteful number, since it uses less digits than its factorization.

51420300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171418 (or 171411 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51420300 is about 7170.7949350124. The cubic root of 51420300 is about 371.8589186370.

Adding to 51420300 its reverse (302415), we get a palindrome (51722715).

The spelling of 51420300 in words is "fifty-one million, four hundred twenty thousand, three hundred".