2515390252581 has 16 divisors (see below), whose sum is σ = 3479980567040. Its totient is φ = 1614423951360.

The previous prime is 2515390252579. The next prime is 2515390252601. The reversal of 2515390252581 is 1852520935152.

It is not a de Polignac number, because 2515390252581 - 2¹ = 2515390252579 is a prime.

It is a super-2 number, since 2×2515390252581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2515390252581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2515390252541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70052536 + ... + 70088433.

It is an arithmetic number, because the mean of its divisors is an integer number (217498785440).

Almost surely, 2^{2515390252581} is an apocalyptic number.

It is an amenable number.

2515390252581 is a deficient number, since it is larger than the sum of its proper divisors (964590314459).

2515390252581 is a wasteful number, since it uses less digits than its factorization.

2515390252581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140141196.

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 2515390252581 in words is "two trillion, five hundred fifteen billion, three hundred ninety million, two hundred fifty-two thousand, five hundred eighty-one".