51294340 has 24 divisors (see below), whose sum is σ = 107856000. Its totient is φ = 20491488.

The previous prime is 51294337. The next prime is 51294361. The reversal of 51294340 is 4349215.

It is a super-2 number, since 2×51294340² = 5262218632071200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51294299 and 51294308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24661 + ... + 26659.

It is an arithmetic number, because the mean of its divisors is an integer number (4494000).

Almost surely, 2^51294340 is an apocalyptic number.

It is an amenable number.

51294340 is an abundant number, since it is smaller than the sum of its proper divisors (56561660).

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

51294340 is a wasteful number, since it uses less digits than its factorization.

51294340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3289 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51294340 is about 7162.0067020354. The cubic root of 51294340 is about 371.5550331569. Note that the first 3 decimals are identical.

The spelling of 51294340 in words is "fifty-one million, two hundred ninety-four thousand, three hundred forty".