157791551 has 2 divisors, whose sum is σ = 157791552. Its totient is φ = 157791550.

The previous prime is 157791539. The next prime is 157791563. The reversal of 157791551 is 155197751.

It is a balanced prime because it is at equal distance from previous prime (157791539) and next prime (157791563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157791551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157791499 and 157791508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157791511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78895775 + 78895776.

It is an arithmetic number, because the mean of its divisors is an integer number (78895776).

Almost surely, 2^157791551 is an apocalyptic number.

157791551 is a deficient number, since it is larger than the sum of its proper divisors (1).

157791551 is an equidigital number, since it uses as much as digits as its factorization.

157791551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55125, while the sum is 41.

The square root of 157791551 is about 12561.5106973644. The cubic root of 157791551 is about 540.3741702585.

The spelling of 157791551 in words is "one hundred fifty-seven million, seven hundred ninety-one thousand, five hundred fifty-one".