55261311 has 16 divisors (see below), whose sum is σ = 84324864. Its totient is φ = 31533984.

The previous prime is 55261307. The next prime is 55261357. The reversal of 55261311 is 11316255.

It is not a de Polignac number, because 55261311 - 2² = 55261307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55261391) 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, 19305 + ... + 21981.

It is an arithmetic number, because the mean of its divisors is an integer number (5270304).

Almost surely, 2^55261311 is an apocalyptic number.

55261311 is a deficient number, since it is larger than the sum of its proper divisors (29063553).

55261311 is a wasteful number, since it uses less digits than its factorization.

55261311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670.

The product of its digits is 900, while the sum is 24.

The square root of 55261311 is about 7433.7951949189. The cubic root of 55261311 is about 380.8965694951.

Adding to 55261311 its reverse (11316255), we get a palindrome (66577566).

The spelling of 55261311 in words is "fifty-five million, two hundred sixty-one thousand, three hundred eleven".