33423157 has 4 divisors (see below), whose sum is σ = 34134336. Its totient is φ = 32711980.

The previous prime is 33423121. The next prime is 33423197. The reversal of 33423157 is 75132433.

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: 75132433 = 1097 ⋅68489.

It is a cyclic number.

It is not a de Polignac number, because 33423157 - 2⁷ = 33423029 is a prime.

It is a super-2 number, since 2×33423157² = 2234214847693298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33423197) 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, 355519 + ... + 355612.

It is an arithmetic number, because the mean of its divisors is an integer number (8533584).

Almost surely, 2^33423157 is an apocalyptic number.

It is an amenable number.

33423157 is a deficient number, since it is larger than the sum of its proper divisors (711179).

33423157 is an equidigital number, since it uses as much as digits as its factorization.

33423157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711178.

The product of its digits is 7560, while the sum is 28.

The square root of 33423157 is about 5781.2764161559. The cubic root of 33423157 is about 322.1186149171.

The spelling of 33423157 in words is "thirty-three million, four hundred twenty-three thousand, one hundred fifty-seven".