1551197047 has 2 divisors, whose sum is σ = 1551197048. Its totient is φ = 1551197046.

The previous prime is 1551197041. The next prime is 1551197077. The reversal of 1551197047 is 7407911551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1551197047 - 2⁷ = 1551196919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551197041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775598523 + 775598524.

It is an arithmetic number, because the mean of its divisors is an integer number (775598524).

Almost surely, 2^1551197047 is an apocalyptic number.

1551197047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551197047 is an equidigital number, since it uses as much as digits as its factorization.

1551197047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 40.

The square root of 1551197047 is about 39385.2389481135. The cubic root of 1551197047 is about 1157.5923723100.

The spelling of 1551197047 in words is "one billion, five hundred fifty-one million, one hundred ninety-seven thousand, forty-seven".