55081965 has 16 divisors (see below), whose sum is σ = 88372800. Its totient is φ = 29296512.

The previous prime is 55081927. The next prime is 55081967. The reversal of 55081965 is 56918055.

It is not a de Polignac number, because 55081965 - 2⁸ = 55081709 is a prime.

It is a super-2 number, since 2×55081965² = 6068045736522450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55081967) 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, 841 + ... + 10529.

It is an arithmetic number, because the mean of its divisors is an integer number (5523300).

Almost surely, 2^55081965 is an apocalyptic number.

It is an amenable number.

55081965 is a deficient number, since it is larger than the sum of its proper divisors (33290835).

55081965 is a wasteful number, since it uses less digits than its factorization.

55081965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 55081965 is about 7421.7225089598. The cubic root of 55081965 is about 380.4840668535.

The spelling of 55081965 in words is "fifty-five million, eighty-one thousand, nine hundred sixty-five".