51213154 has 4 divisors (see below), whose sum is σ = 76819734. Its totient is φ = 25606576.

The previous prime is 51213139. The next prime is 51213179. The reversal of 51213154 is 45131215.

It is a happy number.

51213154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 49322529 + 1890625 = 7023^2 + 1375^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12803287 + ... + 12803290.

Almost surely, 2^51213154 is an apocalyptic number.

51213154 is a deficient number, since it is larger than the sum of its proper divisors (25606580).

51213154 is a wasteful number, since it uses less digits than its factorization.

51213154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25606579.

The product of its digits is 600, while the sum is 22.

The square root of 51213154 is about 7156.3366326634. The cubic root of 51213154 is about 371.3589036846.

Adding to 51213154 its reverse (45131215), we get a palindrome (96344369).

The spelling of 51213154 in words is "fifty-one million, two hundred thirteen thousand, one hundred fifty-four".