1553115213 has 48 divisors (see below), whose sum is σ = 2507734320. Its totient is φ = 919683072.

The previous prime is 1553115211. The next prime is 1553115217. The reversal of 1553115213 is 3125113551.

It can be written as a sum of positive squares in 8 ways, for example, as 5322249 + 1547792964 = 2307^2 + 39342^2 .

It is not a de Polignac number, because 1553115213 - 2¹ = 1553115211 is a prime.

It is a super-3 number, since 3×1553115213³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553115211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1346445 + ... + 1347597.

It is an arithmetic number, because the mean of its divisors is an integer number (52244465).

Almost surely, 2^1553115213 is an apocalyptic number.

1553115213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1553115213 is a deficient number, since it is larger than the sum of its proper divisors (954619107).

1553115213 is a wasteful number, since it uses less digits than its factorization.

1553115213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1595 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1553115213 is about 39409.5827559745. The cubic root of 1553115213 is about 1158.0693243329.

Adding to 1553115213 its reverse (3125113551), we get a palindrome (4678228764).

The spelling of 1553115213 in words is "one billion, five hundred fifty-three million, one hundred fifteen thousand, two hundred thirteen".