1552021189 has 2 divisors, whose sum is σ = 1552021190. Its totient is φ = 1552021188.

The previous prime is 1552021157. The next prime is 1552021193. The reversal of 1552021189 is 9811202551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1519050625 + 32970564 = 38975^2 + 5742^2 .

It is an emirp because it is prime and its reverse (9811202551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1552021189 - 2⁵ = 1552021157 is a prime.

It is a super-2 number, since 2×1552021189² = 4817539542209947442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1552021199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776010594 + 776010595.

It is an arithmetic number, because the mean of its divisors is an integer number (776010595).

Almost surely, 2^1552021189 is an apocalyptic number.

It is an amenable number.

1552021189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552021189 is an equidigital number, since it uses as much as digits as its factorization.

1552021189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 1552021189 is about 39395.7001333902. The cubic root of 1552021189 is about 1157.7973433868.

The spelling of 1552021189 in words is "one billion, five hundred fifty-two million, twenty-one thousand, one hundred eighty-nine".