1131256951 has 6 divisors (see below), whose sum is σ = 1243447856. Its totient is φ = 1028415300.

The previous prime is 1131256949. The next prime is 1131256961. The reversal of 1131256951 is 1596521311.

It is not a de Polignac number, because 1131256951 - 2¹ = 1131256949 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 (1131256961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4674495 + ... + 4674736.

Almost surely, 2^1131256951 is an apocalyptic number.

1131256951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131256951 is a deficient number, since it is larger than the sum of its proper divisors (112190905).

1131256951 is an equidigital number, since it uses as much as digits as its factorization.

1131256951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349253 (or 9349242 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 1131256951 is about 33634.1634502778. The cubic root of 1131256951 is about 1041.9664934831.

The spelling of 1131256951 in words is "one billion, one hundred thirty-one million, two hundred fifty-six thousand, nine hundred fifty-one".