51611448 has 192 divisors, whose sum is σ = 166786560. Its totient is φ = 13001472.

The previous prime is 51611431. The next prime is 51611449. The reversal of 51611448 is 84411615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51611449) 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, 1394886 + ... + 1394922.

It is an arithmetic number, because the mean of its divisors is an integer number (868680).

Almost surely, 2^51611448 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 51611448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83393280).

51611448 is an abundant number, since it is smaller than the sum of its proper divisors (115175112).

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

51611448 is a wasteful number, since it uses less digits than its factorization.

51611448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 91 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 51611448 is about 7184.1108009273. The cubic root of 51611448 is about 372.3191272392.

The spelling of 51611448 in words is "fifty-one million, six hundred eleven thousand, four hundred forty-eight".