83061531 has 56 divisors (see below), whose sum is σ = 146164704. Its totient is φ = 46189440.

The previous prime is 83061529. The next prime is 83061571. The reversal of 83061531 is 13516038.

It is not a de Polignac number, because 83061531 - 2¹ = 83061529 is a prime.

It is a super-2 number, since 2×83061531² = 13798435864127922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 83061495 and 83061504.

It is not an unprimeable number, because it can be changed into a prime (83061571) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 209025 + ... + 209421.

It is an arithmetic number, because the mean of its divisors is an integer number (2610084).

Almost surely, 2^83061531 is an apocalyptic number.

83061531 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

83061531 is a deficient number, since it is larger than the sum of its proper divisors (63103173).

83061531 is an equidigital number, since it uses as much as digits as its factorization.

83061531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 83061531 is about 9113.8099058517. The cubic root of 83061531 is about 436.3148327166.

Adding to 83061531 its reverse (13516038), we get a palindrome (96577569).

The spelling of 83061531 in words is "eighty-three million, sixty-one thousand, five hundred thirty-one".