51651655 has 8 divisors (see below), whose sum is σ = 67616784. Its totient is φ = 37564800.

The previous prime is 51651641. The next prime is 51651659. The reversal of 51651655 is 55615615.

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

It is not a de Polignac number, because 51651655 - 2⁵ = 51651623 is a prime.

It is a super-3 number, since 3×51651655³ (a number of 24 digits) contains 333 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 51651655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651659) 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, 469506 + ... + 469615.

It is an arithmetic number, because the mean of its divisors is an integer number (8452098).

Almost surely, 2^51651655 is an apocalyptic number.

51651655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51651655 is a deficient number, since it is larger than the sum of its proper divisors (15965129).

51651655 is a wasteful number, since it uses less digits than its factorization.

51651655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939137.

The product of its digits is 22500, while the sum is 34.

The square root of 51651655 is about 7186.9085843637. The cubic root of 51651655 is about 372.4157850550.

The spelling of 51651655 in words is "fifty-one million, six hundred fifty-one thousand, six hundred fifty-five".