51546040 has 192 divisors, whose sum is σ = 154728000. Its totient is φ = 15353856.

The previous prime is 51546029. The next prime is 51546043. The reversal of 51546040 is 4064515.

It is a junction number, because it is equal to n+sod(n) for n = 51545996 and 51546014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51546043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3032112 + ... + 3032128.

It is an arithmetic number, because the mean of its divisors is an integer number (805875).

Almost surely, 2^51546040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51546040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77364000).

51546040 is an abundant number, since it is smaller than the sum of its proper divisors (103181960).

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

51546040 is a wasteful number, since it uses less digits than its factorization.

51546040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51546040 is about 7179.5570894032. The cubic root of 51546040 is about 372.1617787880.

The spelling of 51546040 in words is "fifty-one million, five hundred forty-six thousand, forty".