1000145551 has 2 divisors, whose sum is σ = 1000145552. Its totient is φ = 1000145550.

The previous prime is 1000145527. The next prime is 1000145561. The reversal of 1000145551 is 1555410001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1555410001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000145551 - 2¹⁵ = 1000112783 is a prime.

It is a super-2 number, since 2×1000145551² = 2000582246370187202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000145561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500072775 + 500072776.

It is an arithmetic number, because the mean of its divisors is an integer number (500072776).

Almost surely, 2^1000145551 is an apocalyptic number.

1000145551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000145551 is an equidigital number, since it uses as much as digits as its factorization.

1000145551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1000145551 is about 31625.0778813270. The cubic root of 1000145551 is about 1000.0485146463.

Adding to 1000145551 its reverse (1555410001), we get a palindrome (2555555552).

The spelling of 1000145551 in words is "one billion, one hundred forty-five thousand, five hundred fifty-one".