1002122551 has 4 divisors (see below), whose sum is σ = 1017079672. Its totient is φ = 987165432.

The previous prime is 1002122543. The next prime is 1002122587. The reversal of 1002122551 is 1552212001.

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 1002122551 - 2³ = 1002122543 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 (1002122501) 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, 7478460 + ... + 7478593.

It is an arithmetic number, because the mean of its divisors is an integer number (254269918).

Almost surely, 2^1002122551 is an apocalyptic number.

1002122551 is a deficient number, since it is larger than the sum of its proper divisors (14957121).

1002122551 is an equidigital number, since it uses as much as digits as its factorization.

1002122551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14957120.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1002122551 is about 31656.3192901512. The cubic root of 1002122551 is about 1000.7070170091.

Adding to 1002122551 its reverse (1552212001), we get a palindrome (2554334552).

The spelling of 1002122551 in words is "one billion, two million, one hundred twenty-two thousand, five hundred fifty-one".