1231130251 has 8 divisors (see below), whose sum is σ = 1395613520. Its totient is φ = 1076615712.

The previous prime is 1231130239. The next prime is 1231130261. The reversal of 1231130251 is 1520311321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231130251 - 2¹³ = 1231122059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231130221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2491920 + ... + 2492413.

It is an arithmetic number, because the mean of its divisors is an integer number (174451690).

Almost surely, 2^1231130251 is an apocalyptic number.

1231130251 is a deficient number, since it is larger than the sum of its proper divisors (164483269).

1231130251 is a wasteful number, since it uses less digits than its factorization.

1231130251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984365.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1231130251 is about 35087.4657249565. The cubic root of 1231130251 is about 1071.7693528414.

Adding to 1231130251 its reverse (1520311321), we get a palindrome (2751441572).

The spelling of 1231130251 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand, two hundred fifty-one".