1231451151510 has 128 divisors (see below), whose sum is σ = 3208084475904. Its totient is φ = 301342423040.

The previous prime is 1231451151487. The next prime is 1231451151517. The reversal of 1231451151510 is 151511541321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231451151517) 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, 6206440 + ... + 6401780.

It is an arithmetic number, because the mean of its divisors is an integer number (25063159968).

Almost surely, 2^{1231451151510} is an apocalyptic number.

1231451151510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231451151510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604042237952).

1231451151510 is an abundant number, since it is smaller than the sum of its proper divisors (1976633324394).

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

1231451151510 is a wasteful number, since it uses less digits than its factorization.

1231451151510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195678.

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 1231451151510 its reverse (151511541321), we get a palindrome (1382962692831).

The spelling of 1231451151510 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-one million, one hundred fifty-one thousand, five hundred ten".