51169020 has 96 divisors (see below), whose sum is σ = 170892288. Its totient is φ = 11185152.

The previous prime is 51169007. The next prime is 51169049. The reversal of 51169020 is 2096115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7012 + ... + 12308.

It is an arithmetic number, because the mean of its divisors is an integer number (1780128).

Almost surely, 2^51169020 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 51169020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85446144).

51169020 is an abundant number, since it is smaller than the sum of its proper divisors (119723268).

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

51169020 is a wasteful number, since it uses less digits than its factorization.

51169020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 5337 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 51169020 is about 7153.2524071222. The cubic root of 51169020 is about 371.2521976085.

It can be divided in two parts, 51 and 169020, that added together give a triangular number (169071 = T₅₈₁).

The spelling of 51169020 in words is "fifty-one million, one hundred sixty-nine thousand, twenty".