51154505 has 4 divisors (see below), whose sum is σ = 61385412. Its totient is φ = 40923600.

The previous prime is 51154501. The next prime is 51154541. The reversal of 51154505 is 50545115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 39790864 = 3371^2 + 6308^2 .

It is not a de Polignac number, because 51154505 - 2² = 51154501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51154501) 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 3 ways as a sum of consecutive naturals, for example, 5115446 + ... + 5115455.

It is an arithmetic number, because the mean of its divisors is an integer number (15346353).

Almost surely, 2^51154505 is an apocalyptic number.

It is an amenable number.

51154505 is a deficient number, since it is larger than the sum of its proper divisors (10230907).

51154505 is a wasteful number, since it uses less digits than its factorization.

51154505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230906.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 51154505 is about 7152.2377617079. The cubic root of 51154505 is about 371.2170901987.

The spelling of 51154505 in words is "fifty-one million, one hundred fifty-four thousand, five hundred five".