1552133421 has 20 divisors (see below), whose sum is σ = 2336891392. Its totient is φ = 1026601128.

The previous prime is 1552133419. The next prime is 1552133431. The reversal of 1552133421 is 1243312551.

1552133421 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1552133421 - 2¹ = 1552133419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552133431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 65155 + ... + 85728.

Almost surely, 2^1552133421 is an apocalyptic number.

It is an amenable number.

1552133421 is a deficient number, since it is larger than the sum of its proper divisors (784757971).

1552133421 is a wasteful number, since it uses less digits than its factorization.

1552133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151022 (or 151013 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1552133421 is about 39397.1245270515. The cubic root of 1552133421 is about 1157.8252508193.

Adding to 1552133421 its reverse (1243312551), we get a palindrome (2795445972).

The spelling of 1552133421 in words is "one billion, five hundred fifty-two million, one hundred thirty-three thousand, four hundred twenty-one".