31442153 has 4 divisors (see below), whose sum is σ = 32456448. Its totient is φ = 30427860.

The previous prime is 31442141. The next prime is 31442161. The reversal of 31442153 is 35124413.

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: 35124413 = 41 ⋅856693.

It is a cyclic number.

It is not a de Polignac number, because 31442153 - 2¹⁰ = 31441129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31442113) 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, 507101 + ... + 507162.

It is an arithmetic number, because the mean of its divisors is an integer number (8114112).

Almost surely, 2^31442153 is an apocalyptic number.

It is an amenable number.

31442153 is a deficient number, since it is larger than the sum of its proper divisors (1014295).

31442153 is a wasteful number, since it uses less digits than its factorization.

31442153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014294.

The product of its digits is 1440, while the sum is 23.

The square root of 31442153 is about 5607.3302916807. The cubic root of 31442153 is about 315.6245373715.

Adding to 31442153 its reverse (35124413), we get a palindrome (66566566).

The spelling of 31442153 in words is "thirty-one million, four hundred forty-two thousand, one hundred fifty-three".