61231501 has 8 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 56768448.

The previous prime is 61231487. The next prime is 61231517. The reversal of 61231501 is 10513216.

61231501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61231501 - 2¹¹ = 61229453 is a prime.

It is a super-3 number, since 3×61231501³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25741 + ... + 28018.

It is an arithmetic number, because the mean of its divisors is an integer number (8225280).

Almost surely, 2^61231501 is an apocalyptic number.

It is an amenable number.

61231501 is a deficient number, since it is larger than the sum of its proper divisors (4570739).

61231501 is a wasteful number, since it uses less digits than its factorization.

61231501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53843.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61231501 is about 7825.0559742407. The cubic root of 61231501 is about 394.1470694745.

Adding to 61231501 its reverse (10513216), we get a palindrome (71744717).

The spelling of 61231501 in words is "sixty-one million, two hundred thirty-one thousand, five hundred one".