505251623 has 4 divisors (see below), whose sum is σ = 512792760. Its totient is φ = 497710488.

The previous prime is 505251583. The next prime is 505251641. The reversal of 505251623 is 326152505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505251623 - 2⁶ = 505251559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505251683) 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, 3770468 + ... + 3770601.

It is an arithmetic number, because the mean of its divisors is an integer number (128198190).

Almost surely, 2^505251623 is an apocalyptic number.

505251623 is a deficient number, since it is larger than the sum of its proper divisors (7541137).

505251623 is an equidigital number, since it uses as much as digits as its factorization.

505251623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541136.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 505251623 is about 22477.8028953010. The cubic root of 505251623 is about 796.4696641398.

The spelling of 505251623 in words is "five hundred five million, two hundred fifty-one thousand, six hundred twenty-three".