51125406 has 8 divisors (see below), whose sum is σ = 102250824. Its totient is φ = 17041800.

The previous prime is 51125387. The next prime is 51125407. The reversal of 51125406 is 60452115.

It is a sphenic number, since it is the product of 3 distinct primes.

51125406 is an admirable number.

It is a super-2 number, since 2×51125406² = 5227614277329672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4260445 + ... + 4260456.

It is an arithmetic number, because the mean of its divisors is an integer number (12781353).

Almost surely, 2^51125406 is an apocalyptic number.

51125406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51125406 is a wasteful number, since it uses less digits than its factorization.

51125406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8520906.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51125406 is about 7150.2032138954. The cubic root of 51125406 is about 371.1466884815.

The spelling of 51125406 in words is "fifty-one million, one hundred twenty-five thousand, four hundred six".