7552533421 has 4 divisors (see below), whose sum is σ = 7950035200. Its totient is φ = 7155031644.

The previous prime is 7552533413. The next prime is 7552533479. The reversal of 7552533421 is 1243352557.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7552533421 - 2³ = 7552533413 is a prime.

It is a super-2 number, since 2×7552533421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7552533221) 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, 198750861 + ... + 198750898.

It is an arithmetic number, because the mean of its divisors is an integer number (1987508800).

Almost surely, 2^7552533421 is an apocalyptic number.

It is an amenable number.

7552533421 is a deficient number, since it is larger than the sum of its proper divisors (397501779).

7552533421 is a wasteful number, since it uses less digits than its factorization.

7552533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397501778.

The product of its digits is 126000, while the sum is 37.

The square root of 7552533421 is about 86905.3129618667. The cubic root of 7552533421 is about 1961.9934443127.

Adding to 7552533421 its reverse (1243352557), we get a palindrome (8795885978).

The spelling of 7552533421 in words is "seven billion, five hundred fifty-two million, five hundred thirty-three thousand, four hundred twenty-one".