31415145 has 8 divisors (see below), whose sum is σ = 50264256. Its totient is φ = 16754736.

The previous prime is 31415123. The next prime is 31415147. The reversal of 31415145 is 54151413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31415145 - 2⁹ = 31414633 is a prime.

It is a super-2 number, since 2×31415145² = 1973822670742050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31415147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047157 + ... + 1047186.

It is an arithmetic number, because the mean of its divisors is an integer number (6283032).

Almost surely, 2^31415145 is an apocalyptic number.

It is an amenable number.

31415145 is a deficient number, since it is larger than the sum of its proper divisors (18849111).

31415145 is a wasteful number, since it uses less digits than its factorization.

31415145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094351.

The product of its digits is 1200, while the sum is 24.

The square root of 31415145 is about 5604.9214981122. The cubic root of 31415145 is about 315.5341403662.

Adding to 31415145 its reverse (54151413), we get a palindrome (85566558).

The spelling of 31415145 in words is "thirty-one million, four hundred fifteen thousand, one hundred forty-five".