1001522551 has 4 divisors (see below), whose sum is σ = 1015242112. Its totient is φ = 987802992.

The previous prime is 1001522537. The next prime is 1001522591. The reversal of 1001522551 is 1552251001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001522551 - 2²³ = 993133943 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 (1001522591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6859671 + ... + 6859816.

It is an arithmetic number, because the mean of its divisors is an integer number (253810528).

Almost surely, 2^1001522551 is an apocalyptic number.

1001522551 is a deficient number, since it is larger than the sum of its proper divisors (13719561).

1001522551 is an equidigital number, since it uses as much as digits as its factorization.

1001522551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13719560.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1001522551 is about 31646.8410903837. The cubic root of 1001522551 is about 1000.5072596441.

Adding to 1001522551 its reverse (1552251001), we get a palindrome (2553773552).

The spelling of 1001522551 in words is "one billion, one million, five hundred twenty-two thousand, five hundred fifty-one".