1901213133 has 4 divisors (see below), whose sum is σ = 2534950848. Its totient is φ = 1267475420.

The previous prime is 1901213107. The next prime is 1901213159. The reversal of 1901213133 is 3313121091.

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 an interprime number because it is at equal distance from previous prime (1901213107) and next prime (1901213159).

It is a cyclic number.

It is not a de Polignac number, because 1901213133 - 2¹⁰ = 1901212109 is a prime.

It is a super-2 number, since 2×1901213133² = 7229222754183351378, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901213333) 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, 316868853 + ... + 316868858.

It is an arithmetic number, because the mean of its divisors is an integer number (633737712).

Almost surely, 2^1901213133 is an apocalyptic number.

It is an amenable number.

1901213133 is a deficient number, since it is larger than the sum of its proper divisors (633737715).

1901213133 is an equidigital number, since it uses as much as digits as its factorization.

1901213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633737714.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1901213133 is about 43602.9028047445. The cubic root of 1901213133 is about 1238.8258772024.

The spelling of 1901213133 in words is "one billion, nine hundred one million, two hundred thirteen thousand, one hundred thirty-three".