51213454 has 8 divisors (see below), whose sum is σ = 77566320. Its totient is φ = 25358016.

The previous prime is 51213451. The next prime is 51213497. The reversal of 51213454 is 45431215.

It is a happy number.

51213454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51213454² = 5245635741220232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51213451) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 124099 + ... + 124510.

It is an arithmetic number, because the mean of its divisors is an integer number (9695790).

Almost surely, 2^51213454 is an apocalyptic number.

51213454 is a deficient number, since it is larger than the sum of its proper divisors (26352866).

51213454 is a wasteful number, since it uses less digits than its factorization.

51213454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248714.

The product of its digits is 2400, while the sum is 25.

The square root of 51213454 is about 7156.3575930776. The cubic root of 51213454 is about 371.3596288073.

Adding to 51213454 its reverse (45431215), we get a palindrome (96644669).

The spelling of 51213454 in words is "fifty-one million, two hundred thirteen thousand, four hundred fifty-four".