55145969 has 6 divisors (see below), whose sum is σ = 55467426. Its totient is φ = 54825680.

The previous prime is 55145963. The next prime is 55145983. The reversal of 55145969 is 96954155.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 4906225 = 7088^2 + 2215^2 .

It is not a de Polignac number, because 55145969 - 2¹² = 55141873 is a prime.

It is a super-2 number, since 2×55145969² = 6082155793897922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55145963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124262 + ... + 124704.

It is an arithmetic number, because the mean of its divisors is an integer number (9244571).

Almost surely, 2^55145969 is an apocalyptic number.

It is an amenable number.

55145969 is a deficient number, since it is larger than the sum of its proper divisors (321457).

55145969 is an frugal number, since it uses more digits than its factorization.

55145969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 724 counting only the distinct ones).

The product of its digits is 243000, while the sum is 44.

The square root of 55145969 is about 7426.0331941084. The cubic root of 55145969 is about 380.6313811087.

The spelling of 55145969 in words is "fifty-five million, one hundred forty-five thousand, nine hundred sixty-nine".