51154413202 has 4 divisors (see below), whose sum is σ = 76731619806. Its totient is φ = 25577206600.

The previous prime is 51154413181. The next prime is 51154413217. The reversal of 51154413202 is 20231445115.

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

It can be written as a sum of positive squares in only one way, i.e., 40353176161 + 10801237041 = 200881^2 + 103929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788603299 + ... + 12788603302.

Almost surely, 2^51154413202 is an apocalyptic number.

51154413202 is a deficient number, since it is larger than the sum of its proper divisors (25577206604).

51154413202 is a wasteful number, since it uses less digits than its factorization.

51154413202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25577206603.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 51154413202 its reverse (20231445115), we get a palindrome (71385858317).

The spelling of 51154413202 in words is "fifty-one billion, one hundred fifty-four million, four hundred thirteen thousand, two hundred two".