1231550770 has 16 divisors (see below), whose sum is σ = 2217360600. Its totient is φ = 492493824.

The previous prime is 1231550753. The next prime is 1231550773. The reversal of 1231550770 is 770551321.

It can be written as a sum of positive squares in 4 ways, for example, as 1093558761 + 137992009 = 33069^2 + 11747^2 .

It is not an unprimeable number, because it can be changed into a prime (1231550773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31954 + ... + 59026.

Almost surely, 2^1231550770 is an apocalyptic number.

1231550770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231550770 is a deficient number, since it is larger than the sum of its proper divisors (985809830).

1231550770 is a wasteful number, since it uses less digits than its factorization.

1231550770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31629.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 1231550770 is about 35093.4576523887. The cubic root of 1231550770 is about 1071.8913675702.

The spelling of 1231550770 in words is "one billion, two hundred thirty-one million, five hundred fifty thousand, seven hundred seventy".