131021416 has 32 divisors (see below), whose sum is σ = 260006400. Its totient is φ = 61724160.

The previous prime is 131021413. The next prime is 131021441. The reversal of 131021416 is 614120131.

It is a super-2 number, since 2×131021416² = 34333222901290112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 131021393 and 131021402.

It is not an unprimeable number, because it can be changed into a prime (131021411) 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, 26776 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (8125200).

Almost surely, 2^131021416 is an apocalyptic number.

It is an amenable number.

131021416 is a deficient number, since it is larger than the sum of its proper divisors (128984984).

131021416 is a wasteful number, since it uses less digits than its factorization.

131021416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729 (or 4725 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 131021416 is about 11446.4586663299. The cubic root of 131021416 is about 507.9029822788.

Adding to 131021416 its reverse (614120131), we get a palindrome (745141547).

The spelling of 131021416 in words is "one hundred thirty-one million, twenty-one thousand, four hundred sixteen".