51969069 has 12 divisors (see below), whose sum is σ = 76812736. Its totient is φ = 33840072.

The previous prime is 51969067. The next prime is 51969077. The reversal of 51969069 is 96096915.

It is not a de Polignac number, because 51969069 - 2¹ = 51969067 is a prime.

It is a super-2 number, since 2×51969069² = 5401568265453522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51969061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66757 + ... + 67530.

Almost surely, 2^51969069 is an apocalyptic number.

It is an amenable number.

51969069 is a deficient number, since it is larger than the sum of its proper divisors (24843667).

51969069 is a wasteful number, since it uses less digits than its factorization.

51969069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134336 (or 134333 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 51969069 is about 7208.9575529337. The cubic root of 51969069 is about 373.1770943989.

It can be divided in two parts, 5196906 and 9, that added together give a palindrome (5196915).

The spelling of 51969069 in words is "fifty-one million, nine hundred sixty-nine thousand, sixty-nine".