1231751040 has 256 divisors, whose sum is σ = 4302849600. Its totient is φ = 297861120.

The previous prime is 1231751023. The next prime is 1231751041. The reversal of 1231751040 is 401571321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1231751040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231751041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1522156 + ... + 1522964.

Almost surely, 2^1231751040 is an apocalyptic number.

1231751040 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 1231751040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151424800).

1231751040 is an abundant number, since it is smaller than the sum of its proper divisors (3071098560).

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

1231751040 is a wasteful number, since it uses less digits than its factorization.

1231751040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1231751040 is about 35096.3109172460. The cubic root of 1231751040 is about 1071.9494666905.

The spelling of 1231751040 in words is "one billion, two hundred thirty-one million, seven hundred fifty-one thousand, forty".