1552485997 has 4 divisors (see below), whose sum is σ = 1594445116. Its totient is φ = 1510526880.

The previous prime is 1552485989. The next prime is 1552486003. The reversal of 1552485997 is 7995842551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 988850916 + 563635081 = 31446^2 + 23741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552485997 - 2³ = 1552485989 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 (1552485397) 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, 20979504 + ... + 20979577.

It is an arithmetic number, because the mean of its divisors is an integer number (398611279).

Almost surely, 2^1552485997 is an apocalyptic number.

It is an amenable number.

1552485997 is a deficient number, since it is larger than the sum of its proper divisors (41959119).

1552485997 is an equidigital number, since it uses as much as digits as its factorization.

1552485997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41959118.

The product of its digits is 4536000, while the sum is 55.

The square root of 1552485997 is about 39401.5989142573. The cubic root of 1552485997 is about 1157.9129130619.

The spelling of 1552485997 in words is "one billion, five hundred fifty-two million, four hundred eighty-five thousand, nine hundred ninety-seven".