31450645 has 8 divisors (see below), whose sum is σ = 39042360. Its totient is φ = 24292800.

The previous prime is 31450621. The next prime is 31450667. The reversal of 31450645 is 54605413.

31450645 = 174² + 175² + ... + 463².

It can be written as a sum of positive squares in 4 ways, for example, as 12152196 + 19298449 = 3486^2 + 4393^2 .

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

It is not a de Polignac number, because 31450645 - 2⁵ = 31450613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108306 + ... + 108595.

It is an arithmetic number, because the mean of its divisors is an integer number (4880295).

Almost surely, 2^31450645 is an apocalyptic number.

It is an amenable number.

31450645 is a deficient number, since it is larger than the sum of its proper divisors (7591715).

31450645 is a wasteful number, since it uses less digits than its factorization.

31450645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216935.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 31450645 is about 5608.0874636546. The cubic root of 31450645 is about 315.6529497845.

The spelling of 31450645 in words is "thirty-one million, four hundred fifty thousand, six hundred forty-five".