131017020 has 48 divisors (see below), whose sum is σ = 372871968. Its totient is φ = 34364160.

The previous prime is 131016979. The next prime is 131017049. The reversal of 131017020 is 20710131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14239 + ... + 21558.

It is an arithmetic number, because the mean of its divisors is an integer number (7768166).

Almost surely, 2^131017020 is an apocalyptic number.

131017020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131017020 is an abundant number, since it is smaller than the sum of its proper divisors (241854948).

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

131017020 is a wasteful number, since it uses less digits than its factorization.

131017020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35870 (or 35868 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 131017020 is about 11446.2666402631. The cubic root of 131017020 is about 507.8973018678.

Adding to 131017020 its reverse (20710131), we get a palindrome (151727151).

The spelling of 131017020 in words is "one hundred thirty-one million, seventeen thousand, twenty".