1231144554 has 16 divisors (see below), whose sum is σ = 2471654592. Its totient is φ = 408820608.

The previous prime is 1231144547. The next prime is 1231144559. The reversal of 1231144554 is 4554411321.

It is a super-3 number, since 3×1231144554³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231144559) 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, 388519 + ... + 391674.

It is an arithmetic number, because the mean of its divisors is an integer number (154478412).

Almost surely, 2^1231144554 is an apocalyptic number.

1231144554 is an abundant number, since it is smaller than the sum of its proper divisors (1240510038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231144554 is a wasteful number, since it uses less digits than its factorization.

1231144554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780461.

The product of its digits is 9600, while the sum is 30.

The square root of 1231144554 is about 35087.6695435875. The cubic root of 1231144554 is about 1071.7735033521.

Adding to 1231144554 its reverse (4554411321), we get a palindrome (5785555875).

It can be divided in two parts, 12311 and 44554, that added together give a palindrome (56865).

The spelling of 1231144554 in words is "one billion, two hundred thirty-one million, one hundred forty-four thousand, five hundred fifty-four".