2571578242 has 4 divisors (see below), whose sum is σ = 3857367366. Its totient is φ = 1285789120.

The previous prime is 2571578239. The next prime is 2571578291. The reversal of 2571578242 is 2428751752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2571402681 + 175561 = 50709^2 + 419^2 .

It is a super-2 number, since 2×2571578242² = 13226029309455621128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642894559 + ... + 642894562.

Almost surely, 2^2571578242 is an apocalyptic number.

2571578242 is a deficient number, since it is larger than the sum of its proper divisors (1285789124).

2571578242 is a wasteful number, since it uses less digits than its factorization.

2571578242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285789123.

The product of its digits is 313600, while the sum is 43.

The square root of 2571578242 is about 50710.7310339735. The cubic root of 2571578242 is about 1370.0400013184.

The spelling of 2571578242 in words is "two billion, five hundred seventy-one million, five hundred seventy-eight thousand, two hundred forty-two".