55396261 has 4 divisors (see below), whose sum is σ = 55432300. Its totient is φ = 55360224.

The previous prime is 55396249. The next prime is 55396277. The reversal of 55396261 is 16269355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16269355 = 5 ⋅3253871.

It can be written as a sum of positive squares in 2 ways, for example, as 34739236 + 20657025 = 5894^2 + 4545^2 .

It is a cyclic number.

It is not a de Polignac number, because 55396261 - 2²¹ = 53299109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55396261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55396291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15606 + ... + 18823.

It is an arithmetic number, because the mean of its divisors is an integer number (13858075).

Almost surely, 2^55396261 is an apocalyptic number.

It is an amenable number.

55396261 is a deficient number, since it is larger than the sum of its proper divisors (36039).

55396261 is a wasteful number, since it uses less digits than its factorization.

55396261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36038.

The product of its digits is 48600, while the sum is 37.

The square root of 55396261 is about 7442.8664505014. The cubic root of 55396261 is about 381.2063715730.

The spelling of 55396261 in words is "fifty-five million, three hundred ninety-six thousand, two hundred sixty-one".