1525316321540 has 24 divisors (see below), whose sum is σ = 3494361028032. Its totient is φ = 554660480480.

The previous prime is 1525316321537. The next prime is 1525316321569. The reversal of 1525316321540 is 451236135251.

It is a junction number, because it is equal to n+sod(n) for n = 1525316321494 and 1525316321503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3466627784 + ... + 3466628223.

It is an arithmetic number, because the mean of its divisors is an integer number (145598376168).

Almost surely, 2^{1525316321540} is an apocalyptic number.

1525316321540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525316321540 is an abundant number, since it is smaller than the sum of its proper divisors (1969044706492).

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

1525316321540 is a wasteful number, since it uses less digits than its factorization.

1525316321540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933256027 (or 6933256025 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 1525316321540 in words is "one trillion, five hundred twenty-five billion, three hundred sixteen million, three hundred twenty-one thousand, five hundred forty".