13531870 has 16 divisors (see below), whose sum is σ = 26571888. Its totient is φ = 4920640.

The previous prime is 13531867. The next prime is 13531871. The reversal of 13531870 is 7813531.

It is a super-2 number, since 2×13531870² = 366223011393800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531871) 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, 61399 + ... + 61618.

It is an arithmetic number, because the mean of its divisors is an integer number (1660743).

Almost surely, 2^13531870 is an apocalyptic number.

13531870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13531870 is a deficient number, since it is larger than the sum of its proper divisors (13040018).

13531870 is a wasteful number, since it uses less digits than its factorization.

13531870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123035.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13531870 is about 3678.5690152558. The cubic root of 13531870 is about 238.2973826594.

It can be divided in two parts, 1353 and 1870, that added together give a palindrome (3223).

The spelling of 13531870 in words is "thirteen million, five hundred thirty-one thousand, eight hundred seventy".