51509076 has 48 divisors (see below), whose sum is σ = 127142400. Its totient is φ = 16185312.

The previous prime is 51509063. The next prime is 51509089. The reversal of 51509076 is 67090515.

It is an interprime number because it is at equal distance from previous prime (51509063) and next prime (51509089).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59535 + ... + 60393.

It is an arithmetic number, because the mean of its divisors is an integer number (2648800).

Almost surely, 2^51509076 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 51509076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63571200).

51509076 is an abundant number, since it is smaller than the sum of its proper divisors (75633324).

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

51509076 is a wasteful number, since it uses less digits than its factorization.

51509076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 51509076 is about 7176.9823742294. The cubic root of 51509076 is about 372.0727976389.

The spelling of 51509076 in words is "fifty-one million, five hundred nine thousand, seventy-six".