51771048 has 128 divisors (see below), whose sum is σ = 159360000. Its totient is φ = 13970880.

The previous prime is 51771043. The next prime is 51771053. The reversal of 51771048 is 84017715.

It is an interprime number because it is at equal distance from previous prime (51771043) and next prime (51771053).

It is a super-2 number, since 2×51771048² = 5360482822036608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51771043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156243 + ... + 156573.

It is an arithmetic number, because the mean of its divisors is an integer number (1245000).

Almost surely, 2^51771048 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 51771048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79680000).

51771048 is an abundant number, since it is smaller than the sum of its proper divisors (107588952).

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

51771048 is a wasteful number, since it uses less digits than its factorization.

51771048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 51771048 is about 7195.2100733752. The cubic root of 51771048 is about 372.7025110874.

The spelling of 51771048 in words is "fifty-one million, seven hundred seventy-one thousand, forty-eight".