1551441551 has 16 divisors (see below), whose sum is σ = 1714449408. Its totient is φ = 1403808120.

The previous prime is 1551441547. The next prime is 1551441553.

1551441551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1551441551 - 2² = 1551441547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551441553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294200 + ... + 299426.

It is an arithmetic number, because the mean of its divisors is an integer number (107153088).

Almost surely, 2^1551441551 is an apocalyptic number.

1551441551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1551441551 is a deficient number, since it is larger than the sum of its proper divisors (163007857).

1551441551 is an equidigital number, since it uses as much as digits as its factorization.

1551441551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483 (or 5461 counting only the distinct ones).

The product of its digits is 10000, while the sum is 32.

The square root of 1551441551 is about 39388.3428313505. The cubic root of 1551441551 is about 1157.6531900929.

The spelling of 1551441551 in words is "one billion, five hundred fifty-one million, four hundred forty-one thousand, five hundred fifty-one".