51048140 has 72 divisors (see below), whose sum is σ = 126726768. Its totient is φ = 17122560.

The previous prime is 51048131. The next prime is 51048143. The reversal of 51048140 is 4184015.

It is not an unprimeable number, because it can be changed into a prime (51048143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36494 + ... + 37866.

It is an arithmetic number, because the mean of its divisors is an integer number (1760094).

Almost surely, 2^51048140 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 51048140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63363384).

51048140 is an abundant number, since it is smaller than the sum of its proper divisors (75678628).

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

51048140 is a wasteful number, since it uses less digits than its factorization.

51048140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 51048140 is about 7144.7981077145. The cubic root of 51048140 is about 370.9596224611.

The spelling of 51048140 in words is "fifty-one million, forty-eight thousand, one hundred forty".