251116069 has 4 divisors (see below), whose sum is σ = 251420544. Its totient is φ = 250811596.

The previous prime is 251116043. The next prime is 251116091. The reversal of 251116069 is 960611152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 251116069 - 2⁵ = 251116037 is a prime.

It is a super-2 number, since 2×251116069² = 126118560220025522, which contains 22 as substring.

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 251116069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251116009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150997 + ... + 152650.

It is an arithmetic number, because the mean of its divisors is an integer number (62855136).

Almost surely, 2^251116069 is an apocalyptic number.

It is an amenable number.

251116069 is a deficient number, since it is larger than the sum of its proper divisors (304475).

251116069 is an equidigital number, since it uses as much as digits as its factorization.

251116069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304474.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 251116069 is about 15846.6421995324. The cubic root of 251116069 is about 630.8965726187.

The spelling of 251116069 in words is "two hundred fifty-one million, one hundred sixteen thousand, sixty-nine".