1552312331 has 4 divisors (see below), whose sum is σ = 1634013000. Its totient is φ = 1470611664.

The previous prime is 1552312277. The next prime is 1552312351. The reversal of 1552312331 is 1332132551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1552312331 - 2¹⁰ = 1552311307 is a prime.

It is a super-2 number, since 2×1552312331² = 4819347145949307122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1552312331.

It is not an unprimeable number, because it can be changed into a prime (1552312351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40850306 + ... + 40850343.

It is an arithmetic number, because the mean of its divisors is an integer number (408503250).

Almost surely, 2^1552312331 is an apocalyptic number.

1552312331 is a deficient number, since it is larger than the sum of its proper divisors (81700669).

1552312331 is an equidigital number, since it uses as much as digits as its factorization.

1552312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81700668.

The product of its digits is 2700, while the sum is 26.

The square root of 1552312331 is about 39399.3950588077. The cubic root of 1552312331 is about 1157.8697355168.

Adding to 1552312331 its reverse (1332132551), we get a palindrome (2884444882).

The spelling of 1552312331 in words is "one billion, five hundred fifty-two million, three hundred twelve thousand, three hundred thirty-one".