1491122233 has 4 divisors (see below), whose sum is σ = 1492214400. Its totient is φ = 1490030068.

The previous prime is 1491122219. The next prime is 1491122239. The reversal of 1491122233 is 3322211941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3322211941 = 577 ⋅5757733.

It is a cyclic number.

It is not a de Polignac number, because 1491122233 - 2⁵ = 1491122201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491122239) 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, 544033 + ... + 546766.

It is an arithmetic number, because the mean of its divisors is an integer number (373053600).

Almost surely, 2^1491122233 is an apocalyptic number.

It is an amenable number.

1491122233 is a deficient number, since it is larger than the sum of its proper divisors (1092167).

1491122233 is a wasteful number, since it uses less digits than its factorization.

1491122233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092166.

The product of its digits is 2592, while the sum is 28.

The square root of 1491122233 is about 38615.0518968964. The cubic root of 1491122233 is about 1142.4514377800.

The spelling of 1491122233 in words is "one billion, four hundred ninety-one million, one hundred twenty-two thousand, two hundred thirty-three".