2145520351525 has 12 divisors (see below), whose sum is σ = 2686274804512. Its totient is φ = 1699752043440.

The previous prime is 2145520351523. The next prime is 2145520351537. The reversal of 2145520351525 is 5251530255412.

It is not a de Polignac number, because 2145520351525 - 2¹ = 2145520351523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145520351523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416603319 + ... + 416608468.

Almost surely, 2^{2145520351525} is an apocalyptic number.

2145520351525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145520351525 is a deficient number, since it is larger than the sum of its proper divisors (540754452987).

2145520351525 is a wasteful number, since it uses less digits than its factorization.

2145520351525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833211900 (or 833211895 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 40.

The spelling of 2145520351525 in words is "two trillion, one hundred forty-five billion, five hundred twenty million, three hundred fifty-one thousand, five hundred twenty-five".