252776391 has 8 divisors (see below), whose sum is σ = 385183104. Its totient is φ = 144443640.

The previous prime is 252776353. The next prime is 252776423. The reversal of 252776391 is 193677252.

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

It is not a de Polignac number, because 252776391 - 2⁹ = 252775879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252776311) 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, 6018465 + ... + 6018506.

It is an arithmetic number, because the mean of its divisors is an integer number (48147888).

Almost surely, 2^252776391 is an apocalyptic number.

252776391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

252776391 is a deficient number, since it is larger than the sum of its proper divisors (132406713).

252776391 is a wasteful number, since it uses less digits than its factorization.

252776391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12036981.

The product of its digits is 158760, while the sum is 42.

The square root of 252776391 is about 15898.9430780791. The cubic root of 252776391 is about 632.2839673200.

The spelling of 252776391 in words is "two hundred fifty-two million, seven hundred seventy-six thousand, three hundred ninety-one".