31455145 has 16 divisors (see below), whose sum is σ = 40309632. Its totient is φ = 23506560.

The previous prime is 31455139. The next prime is 31455161. The reversal of 31455145 is 54155413.

It is not a de Polignac number, because 31455145 - 2¹³ = 31446953 is a prime.

It is a super-2 number, since 2×31455145² = 1978852293942050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765 + ... + 8125.

It is an arithmetic number, because the mean of its divisors is an integer number (2519352).

Almost surely, 2^31455145 is an apocalyptic number.

It is an amenable number.

31455145 is a deficient number, since it is larger than the sum of its proper divisors (8854487).

31455145 is a wasteful number, since it uses less digits than its factorization.

31455145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432.

The product of its digits is 6000, while the sum is 28.

The square root of 31455145 is about 5608.4886556005. The cubic root of 31455145 is about 315.6680037474.

The spelling of 31455145 in words is "thirty-one million, four hundred fifty-five thousand, one hundred forty-five".