15231451440000 has 160 divisors (see below), whose sum is σ = 50556995988840. Its totient is φ = 4061720320000.

The previous prime is 15231451439951. The next prime is 15231451440017. The reversal of 15231451440000 is 4415413251.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×15231451440000² (a number of 27 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 15231451440000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31492191 + ... + 31972190.

Almost surely, 2^{15231451440000} is an apocalyptic number.

15231451440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15231451440000 is an abundant number, since it is smaller than the sum of its proper divisors (35325544548840).

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

15231451440000 is an frugal number, since it uses more digits than its factorization.

15231451440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63464418 (or 63464391 counting only the distinct ones).

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

Adding to 15231451440000 its reverse (4415413251), we get a palindrome (15235866853251).

The spelling of 15231451440000 in words is "fifteen trillion, two hundred thirty-one billion, four hundred fifty-one million, four hundred forty thousand".