1551562531 has 2 divisors, whose sum is σ = 1551562532. Its totient is φ = 1551562530.

The previous prime is 1551562501. The next prime is 1551562561. The reversal of 1551562531 is 1352651551.

It is a balanced prime because it is at equal distance from previous prime (1551562501) and next prime (1551562561).

It is a cyclic number.

It is not a de Polignac number, because 1551562531 - 2²⁵ = 1518008099 is a prime.

It is a super-2 number, since 2×1551562531² = 4814692575206251922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1551562501) 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 as a sum of consecutive naturals, namely, 775781265 + 775781266.

It is an arithmetic number, because the mean of its divisors is an integer number (775781266).

Almost surely, 2^1551562531 is an apocalyptic number.

1551562531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551562531 is an equidigital number, since it uses as much as digits as its factorization.

1551562531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 34.

The square root of 1551562531 is about 39389.8785349739. The cubic root of 1551562531 is about 1157.6832802248.

The spelling of 1551562531 in words is "one billion, five hundred fifty-one million, five hundred sixty-two thousand, five hundred thirty-one".