127163551 has 2 divisors, whose sum is σ = 127163552. Its totient is φ = 127163550.

The previous prime is 127163489. The next prime is 127163609. The reversal of 127163551 is 155361721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127163551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127163951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63581775 + 63581776.

It is an arithmetic number, because the mean of its divisors is an integer number (63581776).

Almost surely, 2^127163551 is an apocalyptic number.

127163551 is a deficient number, since it is larger than the sum of its proper divisors (1).

127163551 is an equidigital number, since it uses as much as digits as its factorization.

127163551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 127163551 is about 11276.6817371069. The cubic root of 127163551 is about 502.8682494941.

It can be divided in two parts, 12716355 and 1, that added together give a square (12716356 = 3566²).

The spelling of 127163551 in words is "one hundred twenty-seven million, one hundred sixty-three thousand, five hundred fifty-one".