51655495 has 4 divisors (see below), whose sum is σ = 61986600. Its totient is φ = 41324392.

The previous prime is 51655489. The next prime is 51655501. The reversal of 51655495 is 59455615.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51655489) and next prime (51655501).

It is a cyclic number.

It is not a de Polignac number, because 51655495 - 2¹¹ = 51653447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165545 + ... + 5165554.

It is an arithmetic number, because the mean of its divisors is an integer number (15496650).

Almost surely, 2^51655495 is an apocalyptic number.

51655495 is a deficient number, since it is larger than the sum of its proper divisors (10331105).

51655495 is a wasteful number, since it uses less digits than its factorization.

51655495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331104.

The product of its digits is 135000, while the sum is 40.

The square root of 51655495 is about 7187.1757318157. The cubic root of 51655495 is about 372.4250138085.

The spelling of 51655495 in words is "fifty-one million, six hundred fifty-five thousand, four hundred ninety-five".