51133460 has 36 divisors (see below), whose sum is σ = 124914132. Its totient is φ = 17531136.

The previous prime is 51133457. The next prime is 51133463. The reversal of 51133460 is 6433115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51133457) and next prime (51133463).

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 45535504 = 2366^2 + 6748^2 .

It is a super-2 number, since 2×51133460² = 5229261463143200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51133463) 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, 25109 + ... + 27068.

It is an arithmetic number, because the mean of its divisors is an integer number (3469837).

Almost surely, 2^51133460 is an apocalyptic number.

It is an amenable number.

51133460 is an abundant number, since it is smaller than the sum of its proper divisors (73780672).

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

51133460 is a wasteful number, since it uses less digits than its factorization.

51133460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52200 (or 52191 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 51133460 is about 7150.7663924925. The cubic root of 51133460 is about 371.1661768906.

Adding to 51133460 its reverse (6433115), we get a palindrome (57566575).

The spelling of 51133460 in words is "fifty-one million, one hundred thirty-three thousand, four hundred sixty".