51087669 has 32 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 30277632.

The previous prime is 51087661. The next prime is 51087709. The reversal of 51087669 is 96678015.

It is not a de Polignac number, because 51087669 - 2³ = 51087661 is a prime.

It is a super-2 number, since 2×51087669² = 5219899847707122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51087669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51087661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113557 + ... + 114005.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^51087669 is an apocalyptic number.

It is an amenable number.

51087669 is a deficient number, since it is larger than the sum of its proper divisors (25117131).

51087669 is a wasteful number, since it uses less digits than its factorization.

51087669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 51087669 is about 7147.5638507117. The cubic root of 51087669 is about 371.0553483100.

It can be divided in two parts, 5 and 1087669, that multiplied together give a palindrome (5438345).

The spelling of 51087669 in words is "fifty-one million, eighty-seven thousand, six hundred sixty-nine".