274145551 has 2 divisors, whose sum is σ = 274145552. Its totient is φ = 274145550.

The previous prime is 274145513. The next prime is 274145561. The reversal of 274145551 is 155541472.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-274145551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274145561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137072775 + 137072776.

It is an arithmetic number, because the mean of its divisors is an integer number (137072776).

Almost surely, 2^274145551 is an apocalyptic number.

274145551 is a deficient number, since it is larger than the sum of its proper divisors (1).

274145551 is an equidigital number, since it uses as much as digits as its factorization.

274145551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28000, while the sum is 34.

The square root of 274145551 is about 16557.3413022743. The cubic root of 274145551 is about 649.6215161473.

The spelling of 274145551 in words is "two hundred seventy-four million, one hundred forty-five thousand, five hundred fifty-one".