51215269 has 8 divisors (see below), whose sum is σ = 59405888. Its totient is φ = 43243200.

The previous prime is 51215249. The next prime is 51215287. The reversal of 51215269 is 96251215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51215269 - 2¹⁷ = 51084197 is a prime.

It is a super-2 number, since 2×51215269² = 5246007557484722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51215269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51215209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54132 + ... + 55069.

It is an arithmetic number, because the mean of its divisors is an integer number (7425736).

Almost surely, 2^51215269 is an apocalyptic number.

It is an amenable number.

51215269 is a deficient number, since it is larger than the sum of its proper divisors (8190619).

51215269 is a wasteful number, since it uses less digits than its factorization.

51215269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109275.

The product of its digits is 5400, while the sum is 31.

The square root of 51215269 is about 7156.4844022746. The cubic root of 51215269 is about 371.3640157389.

The spelling of 51215269 in words is "fifty-one million, two hundred fifteen thousand, two hundred sixty-nine".