51133700 has 18 divisors (see below), whose sum is σ = 110960346. Its totient is φ = 20453440.

The previous prime is 51133657. The next prime is 51133717. The reversal of 51133700 is 733115.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7150276 + 43983424 = 2674^2 + 6632^2 .

It is a super-2 number, since 2×51133700² = 5229310551380000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255569 + ... + 255768.

Almost surely, 2^51133700 is an apocalyptic number.

51133700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51133700 is an abundant number, since it is smaller than the sum of its proper divisors (59826646).

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

51133700 is a wasteful number, since it uses less digits than its factorization.

51133700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511351 (or 511344 counting only the distinct ones).

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 51133700 is about 7150.7831738908. The cubic root of 51133700 is about 371.1667575915.

Adding to 51133700 its reverse (733115), we get a palindrome (51866815).

The spelling of 51133700 in words is "fifty-one million, one hundred thirty-three thousand, seven hundred".