55425729 has 16 divisors (see below), whose sum is σ = 79133760. Its totient is φ = 34383360.

The previous prime is 55425719. The next prime is 55425743. The reversal of 55425729 is 92752455.

It is not a de Polignac number, because 55425729 - 2⁹ = 55425217 is a prime.

It is a super-2 number, since 2×55425729² = 6144022870362882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55425719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1567 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (4945860).

Almost surely, 2^55425729 is an apocalyptic number.

It is an amenable number.

55425729 is a deficient number, since it is larger than the sum of its proper divisors (23708031).

55425729 is a wasteful number, since it uses less digits than its factorization.

55425729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320.

The product of its digits is 126000, while the sum is 39.

The square root of 55425729 is about 7444.8458009552. The cubic root of 55425729 is about 381.2739537400.

The spelling of 55425729 in words is "fifty-five million, four hundred twenty-five thousand, seven hundred twenty-nine".