551211512023 has 4 divisors (see below), whose sum is σ = 556669051848. Its totient is φ = 545753972200.

The previous prime is 551211511967. The next prime is 551211512057. The reversal of 551211512023 is 320215112155.

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 551211512023 - 2²¹ = 551209414871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551211511982 and 551211512000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551211612023) 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, 2728769761 + ... + 2728769962.

It is an arithmetic number, because the mean of its divisors is an integer number (139167262962).

Almost surely, 2^551211512023 is an apocalyptic number.

551211512023 is a deficient number, since it is larger than the sum of its proper divisors (5457539825).

551211512023 is a wasteful number, since it uses less digits than its factorization.

551211512023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457539824.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 551211512023 its reverse (320215112155), we get a palindrome (871426624178).

The spelling of 551211512023 in words is "five hundred fifty-one billion, two hundred eleven million, five hundred twelve thousand, twenty-three".