1555455133 has 4 divisors (see below), whose sum is σ = 1559625628. Its totient is φ = 1551284640.

The previous prime is 1555455127. The next prime is 1555455157. The reversal of 1555455133 is 3315545551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3315545551 = 719 ⋅4611329.

It can be written as a sum of positive squares in 2 ways, for example, as 1079648164 + 475806969 = 32858^2 + 21813^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555455133 - 2¹³ = 1555446941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1555455092 and 1555455101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555450133) 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, 2084688 + ... + 2085433.

It is an arithmetic number, because the mean of its divisors is an integer number (389906407).

Almost surely, 2^1555455133 is an apocalyptic number.

It is an amenable number.

1555455133 is a deficient number, since it is larger than the sum of its proper divisors (4170495).

1555455133 is an equidigital number, since it uses as much as digits as its factorization.

1555455133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170494.

The product of its digits is 112500, while the sum is 37.

The square root of 1555455133 is about 39439.2587785318. The cubic root of 1555455133 is about 1158.6506140819.

The spelling of 1555455133 in words is "one billion, five hundred fifty-five million, four hundred fifty-five thousand, one hundred thirty-three".