251623061 has 4 divisors (see below), whose sum is σ = 264866400. Its totient is φ = 238379724.

The previous prime is 251623037. The next prime is 251623081. The reversal of 251623061 is 160326152.

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 251623061 - 2⁶ = 251622997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 251623061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251623081) 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, 6621641 + ... + 6621678.

It is an arithmetic number, because the mean of its divisors is an integer number (66216600).

Almost surely, 2^251623061 is an apocalyptic number.

It is an amenable number.

251623061 is a deficient number, since it is larger than the sum of its proper divisors (13243339).

251623061 is a wasteful number, since it uses less digits than its factorization.

251623061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13243338.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 251623061 is about 15862.6309608463. The cubic root of 251623061 is about 631.3208710940.

The spelling of 251623061 in words is "two hundred fifty-one million, six hundred twenty-three thousand, sixty-one".