51654451 has 4 divisors (see below), whose sum is σ = 51742152. Its totient is φ = 51566752.

The previous prime is 51654437. The next prime is 51654461. The reversal of 51654451 is 15445615.

51654451 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, and also an emirpimes, since its reverse is a distinct semiprime: 15445615 = 5 ⋅3089123.

It is a cyclic number.

It is not a de Polignac number, because 51654451 - 2²³ = 43265843 is a prime.

It is a super-2 number, since 2×51654451² = 5336364616222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51654431) 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, 42961 + ... + 44146.

It is an arithmetic number, because the mean of its divisors is an integer number (12935538).

Almost surely, 2^51654451 is an apocalyptic number.

51654451 is a deficient number, since it is larger than the sum of its proper divisors (87701).

51654451 is an equidigital number, since it uses as much as digits as its factorization.

51654451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87700.

The product of its digits is 12000, while the sum is 31.

The square root of 51654451 is about 7187.1031020850. The cubic root of 51654451 is about 372.4225047864.

The spelling of 51654451 in words is "fifty-one million, six hundred fifty-four thousand, four hundred fifty-one".