55349569 has 24 divisors (see below), whose sum is σ = 67019328. Its totient is φ = 45239040.

The previous prime is 55349551. The next prime is 55349573. The reversal of 55349569 is 96594355.

It is not a de Polignac number, because 55349569 - 2⁵ = 55349537 is a prime.

It is a super-2 number, since 2×55349569² = 6127149576971522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55349519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72739 + ... + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (2792472).

Almost surely, 2^55349569 is an apocalyptic number.

It is an amenable number.

55349569 is a deficient number, since it is larger than the sum of its proper divisors (11669759).

55349569 is a wasteful number, since it uses less digits than its factorization.

55349569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 808 counting only the distinct ones).

The product of its digits is 729000, while the sum is 46.

The square root of 55349569 is about 7439.7290945303. The cubic root of 55349569 is about 381.0992386440.

The spelling of 55349569 in words is "fifty-five million, three hundred forty-nine thousand, five hundred sixty-nine".