551251423 has 4 divisors (see below), whose sum is σ = 551530840. Its totient is φ = 550972008.

The previous prime is 551251399. The next prime is 551251429. The reversal of 551251423 is 324152155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324152155 = 5 ⋅64830431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551251423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551251391 and 551251400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551251429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136728 + ... + 140701.

It is an arithmetic number, because the mean of its divisors is an integer number (137882710).

Almost surely, 2^551251423 is an apocalyptic number.

551251423 is a deficient number, since it is larger than the sum of its proper divisors (279417).

551251423 is a wasteful number, since it uses less digits than its factorization.

551251423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279416.

The product of its digits is 6000, while the sum is 28.

The square root of 551251423 is about 23478.7440677733. The cubic root of 551251423 is about 819.9422044334.

The spelling of 551251423 in words is "five hundred fifty-one million, two hundred fifty-one thousand, four hundred twenty-three".