157745551 has 2 divisors, whose sum is σ = 157745552. Its totient is φ = 157745550.

The previous prime is 157745507. The next prime is 157745561. The reversal of 157745551 is 155547751.

It is a strong prime.

It is an emirp because it is prime and its reverse (155547751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157745551 - 2¹¹ = 157743503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157745561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78872775 + 78872776.

It is an arithmetic number, because the mean of its divisors is an integer number (78872776).

Almost surely, 2^157745551 is an apocalyptic number.

157745551 is a deficient number, since it is larger than the sum of its proper divisors (1).

157745551 is an equidigital number, since it uses as much as digits as its factorization.

157745551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122500, while the sum is 40.

The square root of 157745551 is about 12559.6795739382. The cubic root of 157745551 is about 540.3216545026.

The spelling of 157745551 in words is "one hundred fifty-seven million, seven hundred forty-five thousand, five hundred fifty-one".