55729951 has 4 divisors (see below), whose sum is σ = 55795392. Its totient is φ = 55664512.

The previous prime is 55729939. The next prime is 55729969. The reversal of 55729951 is 15992755.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55729951 - 2⁷ = 55729823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55729898 and 55729907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55729991) 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, 31426 + ... + 33151.

It is an arithmetic number, because the mean of its divisors is an integer number (13948848).

Almost surely, 2^55729951 is an apocalyptic number.

55729951 is a deficient number, since it is larger than the sum of its proper divisors (65441).

55729951 is an equidigital number, since it uses as much as digits as its factorization.

55729951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65440.

The product of its digits is 141750, while the sum is 43.

The square root of 55729951 is about 7465.2495604635. The cubic root of 55729951 is about 381.9702630288.

The spelling of 55729951 in words is "fifty-five million, seven hundred twenty-nine thousand, nine hundred fifty-one".