252149681 has 8 divisors (see below), whose sum is σ = 288564864. Its totient is φ = 215832960.

The previous prime is 252149671. The next prime is 252149683. The reversal of 252149681 is 186941252.

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

It is not a de Polignac number, because 252149681 - 2⁶ = 252149617 is a prime.

It is a super-2 number, since 2×252149681² = 127158923256803522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252149683) 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, 19040 + ... + 29441.

It is an arithmetic number, because the mean of its divisors is an integer number (36070608).

Almost surely, 2^252149681 is an apocalyptic number.

It is an amenable number.

252149681 is a deficient number, since it is larger than the sum of its proper divisors (36415183).

252149681 is an equidigital number, since it uses as much as digits as its factorization.

252149681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49231.

The product of its digits is 34560, while the sum is 38.

The square root of 252149681 is about 15879.2216748807. The cubic root of 252149681 is about 631.7609930850.

The spelling of 252149681 in words is "two hundred fifty-two million, one hundred forty-nine thousand, six hundred eighty-one".