551211231201 has 4 divisors (see below), whose sum is σ = 734948308272. Its totient is φ = 367474154132.

The previous prime is 551211231121. The next prime is 551211231209. The reversal of 551211231201 is 102132112155.

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 551211231201 - 2⁷ = 551211231073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551211231209) 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, 91868538531 + ... + 91868538536.

It is an arithmetic number, because the mean of its divisors is an integer number (183737077068).

Almost surely, 2^551211231201 is an apocalyptic number.

It is an amenable number.

551211231201 is a deficient number, since it is larger than the sum of its proper divisors (183737077071).

551211231201 is a wasteful number, since it uses less digits than its factorization.

551211231201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183737077070.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 551211231201 its reverse (102132112155), we get a palindrome (653343343356).

The spelling of 551211231201 in words is "five hundred fifty-one billion, two hundred eleven million, two hundred thirty-one thousand, two hundred one".