55003261 has 2 divisors, whose sum is σ = 55003262. Its totient is φ = 55003260.

The previous prime is 55003231. The next prime is 55003283. The reversal of 55003261 is 16230055.

It is a happy number.

It is an a-pointer prime, because the next prime (55003283) can be obtained adding 55003261 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 1625625 = 7306^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 55003261 - 2¹³ = 54995069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55003231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27501630 + 27501631.

It is an arithmetic number, because the mean of its divisors is an integer number (27501631).

Almost surely, 2^55003261 is an apocalyptic number.

It is an amenable number.

55003261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55003261 is an equidigital number, since it uses as much as digits as its factorization.

55003261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 55003261 is about 7416.4183404120. The cubic root of 55003261 is about 380.3027619446.

The spelling of 55003261 in words is "fifty-five million, three thousand, two hundred sixty-one".