622153249 has 3 divisors (see below), whose sum is σ = 622178193. Its totient is φ = 622128306.

The previous prime is 622153237. The next prime is 622153307. The reversal of 622153249 is 942351226.

The square root of 622153249 is 24943.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 942351226 = 2 ⋅471175613.

It is not a de Polignac number, because 622153249 - 2¹⁹ = 621628961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622153349) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12472 + ... + 37414.

It is an arithmetic number, because the mean of its divisors is an integer number (207392731).

Almost surely, 2^622153249 is an apocalyptic number.

622153249 is the 24943-rd square number.

622153249 is the 12472-nd centered octagonal number.

It is an amenable number.

622153249 is a deficient number, since it is larger than the sum of its proper divisors (24944).

622153249 is an frugal number, since it uses more digits than its factorization.

622153249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49886 (or 24943 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The cubic root of 622153249 is about 853.6878972767.

The spelling of 622153249 in words is "six hundred twenty-two million, one hundred fifty-three thousand, two hundred forty-nine".