231613420 has 24 divisors (see below), whose sum is σ = 511988400. Its totient is φ = 87769152.

The previous prime is 231613391. The next prime is 231613429. The reversal of 231613420 is 24316132.

It is a junction number, because it is equal to n+sod(n) for n = 231613391 and 231613400.

It is not an unprimeable number, because it can be changed into a prime (231613429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304375 + ... + 305134.

It is an arithmetic number, because the mean of its divisors is an integer number (21332850).

Almost surely, 2^231613420 is an apocalyptic number.

231613420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231613420 is an abundant number, since it is smaller than the sum of its proper divisors (280374980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231613420 is a wasteful number, since it uses less digits than its factorization.

231613420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609537 (or 609535 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 231613420 is about 15218.8508107544. The cubic root of 231613420 is about 614.1218833748.

Adding to 231613420 its reverse (24316132), we get a palindrome (255929552).

The spelling of 231613420 in words is "two hundred thirty-one million, six hundred thirteen thousand, four hundred twenty".