2581012397 has 8 divisors (see below), whose sum is σ = 2628138240. Its totient is φ = 2534248080.

The previous prime is 2581012373. The next prime is 2581012411. The reversal of 2581012397 is 7932101852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2581012397 - 2⁸ = 2581012141 is a prime.

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 2581012397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581012327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75953 + ... + 104550.

It is an arithmetic number, because the mean of its divisors is an integer number (328517280).

Almost surely, 2^2581012397 is an apocalyptic number.

It is an amenable number.

2581012397 is a deficient number, since it is larger than the sum of its proper divisors (47125843).

2581012397 is a wasteful number, since it uses less digits than its factorization.

2581012397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180763.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 2581012397 is about 50803.6651925823. The cubic root of 2581012397 is about 1371.7133441433.

The spelling of 2581012397 in words is "two billion, five hundred eighty-one million, twelve thousand, three hundred ninety-seven".