1523131262420 has 48 divisors (see below), whose sum is σ = 3202889776128. Its totient is φ = 608431084800.

The previous prime is 1523131262381. The next prime is 1523131262447. The reversal of 1523131262420 is 242621313251.

It is a super-2 number, since 2×1523131262420² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131855645 + ... + 131867195.

It is an arithmetic number, because the mean of its divisors is an integer number (66726870336).

Almost surely, 2^{1523131262420} is an apocalyptic number.

1523131262420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523131262420 is an abundant number, since it is smaller than the sum of its proper divisors (1679758513708).

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

1523131262420 is a wasteful number, since it uses less digits than its factorization.

1523131262420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19880 (or 19878 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 1523131262420 its reverse (242621313251), we get a palindrome (1765752575671).

The spelling of 1523131262420 in words is "one trillion, five hundred twenty-three billion, one hundred thirty-one million, two hundred sixty-two thousand, four hundred twenty".