1531215285696 has 168 divisors, whose sum is σ = 4619441998080. Its totient is φ = 502786766592.

The previous prime is 1531215285661. The next prime is 1531215285737. The reversal of 1531215285696 is 6965825121351.

1531215285696 is a `hidden beast` number, since 1 + 5 + 3 + 1 + 21 + 52 + 8 + 569 + 6 = 666.

It is a super-2 number, since 2×1531215285696² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307225 + ... + 1776743.

It is an arithmetic number, because the mean of its divisors is an integer number (27496678560).

Almost surely, 2^{1531215285696} is an apocalyptic number.

1531215285696 is a gapful number since it is divisible by the number (16) 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 1531215285696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309720999040).

1531215285696 is an abundant number, since it is smaller than the sum of its proper divisors (3088226712384).

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

1531215285696 is an equidigital number, since it uses as much as digits as its factorization.

1531215285696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469613 (or 1469591 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 54.

The spelling of 1531215285696 in words is "one trillion, five hundred thirty-one billion, two hundred fifteen million, two hundred eighty-five thousand, six hundred ninety-six".