51669948 has 48 divisors (see below), whose sum is σ = 132257664. Its totient is φ = 15570240.

The previous prime is 51669941. The next prime is 51669971. The reversal of 51669948 is 84996615.

It is a junction number, because it is equal to n+sod(n) for n = 51669897 and 51669906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51669941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25011 + ... + 26997.

It is an arithmetic number, because the mean of its divisors is an integer number (2755368).

Almost surely, 2^51669948 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 51669948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66128832).

51669948 is an abundant number, since it is smaller than the sum of its proper divisors (80587716).

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

51669948 is a wasteful number, since it uses less digits than its factorization.

51669948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2200 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 51669948 is about 7188.1811329432. The cubic root of 51669948 is about 372.4597449104.

The spelling of 51669948 in words is "fifty-one million, six hundred sixty-nine thousand, nine hundred forty-eight".