1231587151 has 16 divisors (see below), whose sum is σ = 1340871840. Its totient is φ = 1126609920.

The previous prime is 1231587139. The next prime is 1231587157. The reversal of 1231587151 is 1517851321.

It is a cyclic number.

It is not a de Polignac number, because 1231587151 - 2⁹ = 1231586639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231587157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189880 + ... + 196258.

It is an arithmetic number, because the mean of its divisors is an integer number (83804490).

Almost surely, 2^1231587151 is an apocalyptic number.

1231587151 is a deficient number, since it is larger than the sum of its proper divisors (109284689).

1231587151 is a wasteful number, since it uses less digits than its factorization.

1231587151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714.

The product of its digits is 8400, while the sum is 34.

The square root of 1231587151 is about 35093.9759930390. The cubic root of 1231587151 is about 1071.9019223105.

The spelling of 1231587151 in words is "one billion, two hundred thirty-one million, five hundred eighty-seven thousand, one hundred fifty-one".