51611395 has 32 divisors (see below), whose sum is σ = 70076160. Its totient is φ = 36167040.

The previous prime is 51611393. The next prime is 51611423. The reversal of 51611395 is 59311615.

It is not a de Polignac number, because 51611395 - 2¹ = 51611393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51611393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328657 + ... + 328813.

It is an arithmetic number, because the mean of its divisors is an integer number (2189880).

Almost surely, 2^51611395 is an apocalyptic number.

51611395 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51611395 is a deficient number, since it is larger than the sum of its proper divisors (18464765).

51611395 is a wasteful number, since it uses less digits than its factorization.

51611395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355.

The product of its digits is 4050, while the sum is 31.

The square root of 51611395 is about 7184.1071122304. The cubic root of 51611395 is about 372.3189997938.

It can be divided in two parts, 5161 and 1395, that added together give a palindrome (6556).

The spelling of 51611395 in words is "fifty-one million, six hundred eleven thousand, three hundred ninety-five".