1523132231540 has 48 divisors (see below), whose sum is σ = 3391440192000. Its totient is φ = 572616878592.

The previous prime is 1523132231437. The next prime is 1523132231573. The reversal of 1523132231540 is 451322313251.

It is a junction number, because it is equal to n+sod(n) for n = 1523132231497 and 1523132231506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870840 + ... + 3359759.

It is an arithmetic number, because the mean of its divisors is an integer number (70655004000).

Almost surely, 2^{1523132231540} is an apocalyptic number.

1523132231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523132231540 is an abundant number, since it is smaller than the sum of its proper divisors (1868307960460).

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

1523132231540 is a wasteful number, since it uses less digits than its factorization.

1523132231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6231344 (or 6231342 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 1523132231540 its reverse (451322313251), we get a palindrome (1974454544791).

The spelling of 1523132231540 in words is "one trillion, five hundred twenty-three billion, one hundred thirty-two million, two hundred thirty-one thousand, five hundred forty".