31498497 has 16 divisors (see below), whose sum is σ = 46800000. Its totient is φ = 20938032.

The previous prime is 31498471. The next prime is 31498499. The reversal of 31498497 is 79489413.

It is not a de Polignac number, because 31498497 - 2¹¹ = 31496449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31498499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9004 + ... + 12002.

It is an arithmetic number, because the mean of its divisors is an integer number (2925000).

Almost surely, 2^31498497 is an apocalyptic number.

It is an amenable number.

31498497 is a deficient number, since it is larger than the sum of its proper divisors (15301503).

31498497 is a wasteful number, since it uses less digits than its factorization.

31498497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397 (or 3391 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 31498497 is about 5612.3521806815. The cubic root of 31498497 is about 315.8129567932.

The spelling of 31498497 in words is "thirty-one million, four hundred ninety-eight thousand, four hundred ninety-seven".