51388469 has 8 divisors (see below), whose sum is σ = 57011040. Its totient is φ = 45924400.

The previous prime is 51388459. The next prime is 51388481. The reversal of 51388469 is 96488315.

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

It is a cyclic number.

It is not a de Polignac number, because 51388469 - 2⁴ = 51388453 is a prime.

It is a super-2 number, since 2×51388469² = 5281549492327922, 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 (51388409) 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, 38942 + ... + 40239.

It is an arithmetic number, because the mean of its divisors is an integer number (7126380).

Almost surely, 2^51388469 is an apocalyptic number.

51388469 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51388469 is a deficient number, since it is larger than the sum of its proper divisors (5622571).

51388469 is a wasteful number, since it uses less digits than its factorization.

51388469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79251.

The product of its digits is 207360, while the sum is 44.

The square root of 51388469 is about 7168.5751024872. The cubic root of 51388469 is about 371.7821714865.

The spelling of 51388469 in words is "fifty-one million, three hundred eighty-eight thousand, four hundred sixty-nine".