33442157 has 8 divisors (see below), whose sum is σ = 39000000. Its totient is φ = 28664412.

The previous prime is 33442153. The next prime is 33442159. The reversal of 33442157 is 75124433.

It is a happy number.

It is not a de Polignac number, because 33442157 - 2² = 33442153 is a prime.

It is a super-2 number, since 2×33442157² = 2236755729625298, 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 (33442153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48407 + ... + 49092.

It is an arithmetic number, because the mean of its divisors is an integer number (4875000).

Almost surely, 2^33442157 is an apocalyptic number.

It is an amenable number.

33442157 is a deficient number, since it is larger than the sum of its proper divisors (5557843).

33442157 is an frugal number, since it uses more digits than its factorization.

33442157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97520 (or 97506 counting only the distinct ones).

The product of its digits is 10080, while the sum is 29.

The square root of 33442157 is about 5782.9194184253. The cubic root of 33442157 is about 322.1796414117.

The spelling of 33442157 in words is "thirty-three million, four hundred forty-two thousand, one hundred fifty-seven".