251144061 has 48 divisors (see below), whose sum is σ = 413683200. Its totient is φ = 134837472.

The previous prime is 251144057. The next prime is 251144063. The reversal of 251144061 is 160441152.

It is a happy number.

It is not a de Polignac number, because 251144061 - 2² = 251144057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251144063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198850 + ... + 200108.

It is an arithmetic number, because the mean of its divisors is an integer number (8618400).

Almost surely, 2^251144061 is an apocalyptic number.

251144061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

251144061 is a deficient number, since it is larger than the sum of its proper divisors (162539139).

251144061 is a wasteful number, since it uses less digits than its factorization.

251144061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358 (or 1351 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 251144061 is about 15847.5253904198. The cubic root of 251144061 is about 630.9200138382.

The spelling of 251144061 in words is "two hundred fifty-one million, one hundred forty-four thousand, sixty-one".