83401531 has 4 divisors (see below), whose sum is σ = 83601000. Its totient is φ = 83202064.

The previous prime is 83401523. The next prime is 83401537. The reversal of 83401531 is 13510438.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83401531 - 2³ = 83401523 is a prime.

It is a super-2 number, since 2×83401531² = 13911630746287922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83401496 and 83401505.

It is not an unprimeable number, because it can be changed into a prime (83401537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99106 + ... + 99943.

It is an arithmetic number, because the mean of its divisors is an integer number (20900250).

Almost surely, 2^83401531 is an apocalyptic number.

83401531 is a deficient number, since it is larger than the sum of its proper divisors (199469).

83401531 is a wasteful number, since it uses less digits than its factorization.

83401531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199468.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 83401531 is about 9132.4438678811. The cubic root of 83401531 is about 436.9093521780.

Adding to 83401531 its reverse (13510438), we get a palindrome (96911969).

The spelling of 83401531 in words is "eighty-three million, four hundred one thousand, five hundred thirty-one".