51533100 has 54 divisors (see below), whose sum is σ = 161530460. Its totient is φ = 13741920.

The previous prime is 51533099. The next prime is 51533107. The reversal of 51533100 is 133515.

It is a happy number.

It is a super-2 number, since 2×51533100² = 5311320791220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51533107) 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 17 ways as a sum of consecutive naturals, for example, 27730 + ... + 29529.

Almost surely, 2^51533100 is an apocalyptic number.

51533100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51533100 is an abundant number, since it is smaller than the sum of its proper divisors (109997360).

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

51533100 is a wasteful number, since it uses less digits than its factorization.

51533100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57279 (or 57269 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 51533100 is about 7178.6558630429. The cubic root of 51533100 is about 372.1306339677.

Adding to 51533100 its reverse (133515), we get a palindrome (51666615).

The spelling of 51533100 in words is "fifty-one million, five hundred thirty-three thousand, one hundred".