1545125551 has 2 divisors, whose sum is σ = 1545125552. Its totient is φ = 1545125550.

The previous prime is 1545125537. The next prime is 1545125609. The reversal of 1545125551 is 1555215451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1545125551 - 2²⁵ = 1511571119 is a prime.

It is a super-3 number, since 3×1545125551³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545125531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772562775 + 772562776.

It is an arithmetic number, because the mean of its divisors is an integer number (772562776).

Almost surely, 2^1545125551 is an apocalyptic number.

1545125551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545125551 is an equidigital number, since it uses as much as digits as its factorization.

1545125551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25000, while the sum is 34.

The square root of 1545125551 is about 39308.0850589290. The cubic root of 1545125551 is about 1156.0800978072.

The spelling of 1545125551 in words is "one billion, five hundred forty-five million, one hundred twenty-five thousand, five hundred fifty-one".