1000133551 has 4 divisors (see below), whose sum is σ = 1006757104. Its totient is φ = 993510000.

The previous prime is 1000133521. The next prime is 1000133557. The reversal of 1000133551 is 1553310001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1553310001 = 3049 ⋅509449.

It is a cyclic number.

It is not a de Polignac number, because 1000133551 - 2¹³ = 1000125359 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 (1000133557) 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, 3311550 + ... + 3311851.

It is an arithmetic number, because the mean of its divisors is an integer number (251689276).

Almost surely, 2^1000133551 is an apocalyptic number.

1000133551 is a deficient number, since it is larger than the sum of its proper divisors (6623553).

1000133551 is an equidigital number, since it uses as much as digits as its factorization.

1000133551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6623552.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 1000133551 is about 31624.8881579050. Note that the first 3 decimals coincide. The cubic root of 1000133551 is about 1000.0445150184.

Adding to 1000133551 its reverse (1553310001), we get a palindrome (2553443552).

The spelling of 1000133551 in words is "one billion, one hundred thirty-three thousand, five hundred fifty-one".