1026231551 has 4 divisors (see below), whose sum is σ = 1026925032. Its totient is φ = 1025538072.

The previous prime is 1026231529. The next prime is 1026231559. The reversal of 1026231551 is 1551326201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1026231551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1026231551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026231559) 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, 344516 + ... + 347481.

It is an arithmetic number, because the mean of its divisors is an integer number (256731258).

Almost surely, 2^1026231551 is an apocalyptic number.

1026231551 is a deficient number, since it is larger than the sum of its proper divisors (693481).

1026231551 is an equidigital number, since it uses as much as digits as its factorization.

1026231551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693480.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1026231551 is about 32034.8490085407. The cubic root of 1026231551 is about 1008.6684904814.

Adding to 1026231551 its reverse (1551326201), we get a palindrome (2577557752).

The spelling of 1026231551 in words is "one billion, twenty-six million, two hundred thirty-one thousand, five hundred fifty-one".