1551232251 has 6 divisors (see below), whose sum is σ = 2240668820. Its totient is φ = 1034154828.

The previous prime is 1551232213. The next prime is 1551232259. The reversal of 1551232251 is 1522321551.

It is not a de Polignac number, because 1551232251 - 2¹⁴ = 1551215867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551232259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86179561 + ... + 86179578.

Almost surely, 2^1551232251 is an apocalyptic number.

1551232251 is a deficient number, since it is larger than the sum of its proper divisors (689436569).

1551232251 is a wasteful number, since it uses less digits than its factorization.

1551232251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172359145 (or 172359142 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1551232251 is about 39385.6858642832. The cubic root of 1551232251 is about 1157.6011293263.

The spelling of 1551232251 in words is "one billion, five hundred fifty-one million, two hundred thirty-two thousand, two hundred fifty-one".