1555078253 has 2 divisors, whose sum is σ = 1555078254. Its totient is φ = 1555078252.

The previous prime is 1555078219. The next prime is 1555078271. The reversal of 1555078253 is 3528705551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250471044 + 304607209 = 35362^2 + 17453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555078253 - 2¹⁰ = 1555077229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1555078253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555078153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777539126 + 777539127.

It is an arithmetic number, because the mean of its divisors is an integer number (777539127).

Almost surely, 2^1555078253 is an apocalyptic number.

It is an amenable number.

1555078253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555078253 is an equidigital number, since it uses as much as digits as its factorization.

1555078253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210000, while the sum is 41.

The square root of 1555078253 is about 39434.4805088136. The cubic root of 1555078253 is about 1158.5570278581.

The spelling of 1555078253 in words is "one billion, five hundred fifty-five million, seventy-eight thousand, two hundred fifty-three".