145530551 has 2 divisors, whose sum is σ = 145530552. Its totient is φ = 145530550.

The previous prime is 145530493. The next prime is 145530563. The reversal of 145530551 is 155035541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145530551 - 2¹⁴ = 145514167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145532551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72765275 + 72765276.

It is an arithmetic number, because the mean of its divisors is an integer number (72765276).

Almost surely, 2^145530551 is an apocalyptic number.

145530551 is a deficient number, since it is larger than the sum of its proper divisors (1).

145530551 is an equidigital number, since it uses as much as digits as its factorization.

145530551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 145530551 is about 12063.6043950388. The cubic root of 145530551 is about 525.9987650990.

The spelling of 145530551 in words is "one hundred forty-five million, five hundred thirty thousand, five hundred fifty-one".