1554252313 has 4 divisors (see below), whose sum is σ = 1592160948. Its totient is φ = 1516343680.

The previous prime is 1554252299. The next prime is 1554252389. The reversal of 1554252313 is 3132524551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3132524551 = 13 ⋅240963427.

It can be written as a sum of positive squares in 2 ways, for example, as 761097744 + 793154569 = 27588^2 + 28163^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554252313 - 2¹⁷ = 1554121241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1554252113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18954256 + ... + 18954337.

It is an arithmetic number, because the mean of its divisors is an integer number (398040237).

Almost surely, 2^1554252313 is an apocalyptic number.

It is an amenable number.

1554252313 is a deficient number, since it is larger than the sum of its proper divisors (37908635).

1554252313 is an equidigital number, since it uses as much as digits as its factorization.

1554252313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37908634.

The product of its digits is 18000, while the sum is 31.

The square root of 1554252313 is about 39424.0068105717. The cubic root of 1554252313 is about 1158.3518788996.

Adding to 1554252313 its reverse (3132524551), we get a palindrome (4686776864).

The spelling of 1554252313 in words is "one billion, five hundred fifty-four million, two hundred fifty-two thousand, three hundred thirteen".