55081377 has 60 divisors (see below), whose sum is σ = 94650556. Its totient is φ = 31726080.

The previous prime is 55081357. The next prime is 55081381. The reversal of 55081377 is 77318055.

It can be written as a sum of positive squares in 6 ways, for example, as 3111696 + 51969681 = 1764^2 + 7209^2 .

It is not a de Polignac number, because 55081377 - 2¹⁴ = 55064993 is a prime.

It is a super-2 number, since 2×55081377² = 6067916184432258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55081307) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 304227 + ... + 304407.

Almost surely, 2^55081377 is an apocalyptic number.

It is an amenable number.

55081377 is a deficient number, since it is larger than the sum of its proper divisors (39569179).

55081377 is a wasteful number, since it uses less digits than its factorization.

55081377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 55081377 is about 7421.6828954086. The cubic root of 55081377 is about 380.4827129595.

It can be divided in two parts, 5508 and 1377, that multiplied together give a square (7584516 = 2754²).

The spelling of 55081377 in words is "fifty-five million, eighty-one thousand, three hundred seventy-seven".