61326131 has 4 divisors (see below), whose sum is σ = 62983632. Its totient is φ = 59668632.

The previous prime is 61326121. The next prime is 61326149. The reversal of 61326131 is 13162316.

It is a happy number.

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 61326131 - 2¹⁴ = 61309747 is a prime.

It is a super-2 number, since 2×61326131² = 7521788686858322, 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 = 61326097 and 61326106.

It is not an unprimeable number, because it can be changed into a prime (61326121) 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, 828695 + ... + 828768.

It is an arithmetic number, because the mean of its divisors is an integer number (15745908).

Almost surely, 2^61326131 is an apocalyptic number.

61326131 is a deficient number, since it is larger than the sum of its proper divisors (1657501).

61326131 is a wasteful number, since it uses less digits than its factorization.

61326131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657500.

The product of its digits is 648, while the sum is 23.

The square root of 61326131 is about 7831.1002419839. The cubic root of 61326131 is about 394.3500093500.

Adding to 61326131 its reverse (13162316), we get a palindrome (74488447).

It can be divided in two parts, 613261 and 31, that multiplied together give a palindrome (19011091).

The spelling of 61326131 in words is "sixty-one million, three hundred twenty-six thousand, one hundred thirty-one".