231481497 has 12 divisors (see below), whose sum is σ = 334210704. Its totient is φ = 142449840.

The previous prime is 231481489. The next prime is 231481507. The reversal of 231481497 is 794184132.

It is not a de Polignac number, because 231481497 - 2³ = 231481489 is a prime.

It is a super-2 number, since 2×231481497² = 107167366906722018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (231481417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227779 + ... + 228792.

It is an arithmetic number, because the mean of its divisors is an integer number (27850892).

Almost surely, 2^231481497 is an apocalyptic number.

It is an amenable number.

231481497 is a deficient number, since it is larger than the sum of its proper divisors (102729207).

231481497 is a wasteful number, since it uses less digits than its factorization.

231481497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456600 (or 456587 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 231481497 is about 15214.5159962452. The cubic root of 231481497 is about 614.0052634944.

The spelling of 231481497 in words is "two hundred thirty-one million, four hundred eighty-one thousand, four hundred ninety-seven".