1551001551 has 32 divisors (see below), whose sum is σ = 2327049216. Its totient is φ = 910800000.

The previous prime is 1551001453. The next prime is 1551001583.

1551001551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1551001551 - 2¹⁰ = 1551000527 is a prime.

It is a super-2 number, since 2×1551001551² = 4811211622408811202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551001051) 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 31 ways as a sum of consecutive naturals, for example, 151701 + ... + 161601.

It is an arithmetic number, because the mean of its divisors is an integer number (72720288).

Almost surely, 2^1551001551 is an apocalyptic number.

1551001551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1551001551 is a deficient number, since it is larger than the sum of its proper divisors (776047665).

1551001551 is a wasteful number, since it uses less digits than its factorization.

1551001551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063.

The product of its (nonzero) digits is 625, while the sum is 24.

The square root of 1551001551 is about 39382.7570263942. The cubic root of 1551001551 is about 1157.5437401506.

It can be divided in two parts, 155100 and 1551, that multiplied together give a square (240560100 = 15510²).

The spelling of 1551001551 in words is "one billion, five hundred fifty-one million, one thousand, five hundred fifty-one".