51340269 has 8 divisors (see below), whose sum is σ = 68534752. Its totient is φ = 34186320.

The previous prime is 51340259. The next prime is 51340319. The reversal of 51340269 is 96204315.

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

It is not a de Polignac number, because 51340269 - 2⁴ = 51340253 is a prime.

It is a super-2 number, since 2×51340269² = 5271646441984722, 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 (51340229) 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, 7042 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (8566844).

Almost surely, 2^51340269 is an apocalyptic number.

It is an amenable number.

51340269 is a deficient number, since it is larger than the sum of its proper divisors (17194483).

51340269 is a wasteful number, since it uses less digits than its factorization.

51340269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20267.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 51340269 is about 7165.2124183446. The cubic root of 51340269 is about 371.6658969823.

The spelling of 51340269 in words is "fifty-one million, three hundred forty thousand, two hundred sixty-nine".