55947451 has 4 divisors (see below), whose sum is σ = 63939952. Its totient is φ = 47954952.

The previous prime is 55947443. The next prime is 55947461. The reversal of 55947451 is 15474955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15474955 = 5 ⋅3094991.

It is a cyclic number.

It is not a de Polignac number, because 55947451 - 2³ = 55947443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55947401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3996240 + ... + 3996253.

It is an arithmetic number, because the mean of its divisors is an integer number (15984988).

Almost surely, 2^55947451 is an apocalyptic number.

55947451 is a deficient number, since it is larger than the sum of its proper divisors (7992501).

55947451 is an equidigital number, since it uses as much as digits as its factorization.

55947451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7992500.

The product of its digits is 126000, while the sum is 40.

The square root of 55947451 is about 7479.8028717340. The cubic root of 55947451 is about 382.4665293167.

The spelling of 55947451 in words is "fifty-five million, nine hundred forty-seven thousand, four hundred fifty-one".