2152781258 has 8 divisors (see below), whose sum is σ = 3229655652. Its totient is φ = 1076229376.

The previous prime is 2152781243. The next prime is 2152781287. The reversal of 2152781258 is 8521872512.

It can be written as a sum of positive squares in 2 ways, for example, as 1633533889 + 519247369 = 40417^2 + 22787^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63185 + ... + 91092.

Almost surely, 2^2152781258 is an apocalyptic number.

2152781258 is a deficient number, since it is larger than the sum of its proper divisors (1076874394).

2152781258 is a wasteful number, since it uses less digits than its factorization.

2152781258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161256.

The product of its digits is 89600, while the sum is 41.

The square root of 2152781258 is about 46398.0738608835. The cubic root of 2152781258 is about 1291.2191783019.

The spelling of 2152781258 in words is "two billion, one hundred fifty-two million, seven hundred eighty-one thousand, two hundred fifty-eight".