1552345021 has 16 divisors (see below), whose sum is σ = 1688632704. Its totient is φ = 1421328384.

The previous prime is 1552344991. The next prime is 1552345061. The reversal of 1552345021 is 1205432551.

It is not a de Polignac number, because 1552345021 - 2²³ = 1543956413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552345061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183736 + ... + 191998.

It is an arithmetic number, because the mean of its divisors is an integer number (105539544).

Almost surely, 2^1552345021 is an apocalyptic number.

It is an amenable number.

1552345021 is a deficient number, since it is larger than the sum of its proper divisors (136287683).

1552345021 is a wasteful number, since it uses less digits than its factorization.

1552345021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1552345021 is about 39399.8099107090. The cubic root of 1552345021 is about 1157.8778632831.

Adding to 1552345021 its reverse (1205432551), we get a palindrome (2757777572).

The spelling of 1552345021 in words is "one billion, five hundred fifty-two million, three hundred forty-five thousand, twenty-one".