1555500253 has 8 divisors (see below), whose sum is σ = 1560993336. Its totient is φ = 1550016000.

The previous prime is 1555500197. The next prime is 1555500277. The reversal of 1555500253 is 3520055551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 434388964 + 1121111289 = 20842^2 + 33483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555500253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555500053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648825 + ... + 651217.

It is an arithmetic number, because the mean of its divisors is an integer number (195124167).

Almost surely, 2^1555500253 is an apocalyptic number.

It is an amenable number.

1555500253 is a deficient number, since it is larger than the sum of its proper divisors (5493083).

1555500253 is a wasteful number, since it uses less digits than its factorization.

1555500253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 1555500253 is about 39439.8307932476. The cubic root of 1555500253 is about 1158.6618171930.

The spelling of 1555500253 in words is "one billion, five hundred fifty-five million, five hundred thousand, two hundred fifty-three".