51825340 has 36 divisors (see below), whose sum is σ = 126604296. Its totient is φ = 17768352.

The previous prime is 51825317. The next prime is 51825341. The reversal of 51825340 is 4352815.

It is a super-2 number, since 2×51825340² = 5371731732231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 51825299 and 51825308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51825341) 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, 25462 + ... + 27421.

It is an arithmetic number, because the mean of its divisors is an integer number (3516786).

Almost surely, 2^51825340 is an apocalyptic number.

It is an amenable number.

51825340 is an abundant number, since it is smaller than the sum of its proper divisors (74778956).

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

51825340 is a wasteful number, since it uses less digits than its factorization.

51825340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52906 (or 52897 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 51825340 is about 7198.9818724595. The cubic root of 51825340 is about 372.8327492306.

The spelling of 51825340 in words is "fifty-one million, eight hundred twenty-five thousand, three hundred forty".