149222257 has 4 divisors (see below), whose sum is σ = 157076080. Its totient is φ = 141368436.

The previous prime is 149222201. The next prime is 149222303. The reversal of 149222257 is 752222941.

It is a happy number.

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 de Polignac number, because none of the positive numbers 2^k-149222257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149222357) 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, 3926883 + ... + 3926920.

It is an arithmetic number, because the mean of its divisors is an integer number (39269020).

Almost surely, 2^149222257 is an apocalyptic number.

It is an amenable number.

149222257 is a deficient number, since it is larger than the sum of its proper divisors (7853823).

149222257 is an equidigital number, since it uses as much as digits as its factorization.

149222257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7853822.

The product of its digits is 20160, while the sum is 34.

The square root of 149222257 is about 12215.6562246979. The cubic root of 149222257 is about 530.4093870309.

The spelling of 149222257 in words is "one hundred forty-nine million, two hundred twenty-two thousand, two hundred fifty-seven".