1231463520 has 384 divisors, whose sum is σ = 4974842880. Its totient is φ = 278691840.

The previous prime is 1231463509. The next prime is 1231463521. The reversal of 1231463520 is 253641321.

1231463520 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 4 + 635 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231463521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5836215 + ... + 5836425.

It is an arithmetic number, because the mean of its divisors is an integer number (12955320).

Almost surely, 2^1231463520 is an apocalyptic number.

1231463520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231463520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2487421440).

1231463520 is an abundant number, since it is smaller than the sum of its proper divisors (3743379360).

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

1231463520 is a wasteful number, since it uses less digits than its factorization.

1231463520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1231463520 is about 35092.2145211726. The cubic root of 1231463520 is about 1071.8660540298.

The spelling of 1231463520 in words is "one billion, two hundred thirty-one million, four hundred sixty-three thousand, five hundred twenty".