61544231 has 8 divisors (see below), whose sum is σ = 70744224. Its totient is φ = 52446240.

The previous prime is 61544221. The next prime is 61544237. The reversal of 61544231 is 13244516.

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

It is not a de Polignac number, because 61544231 - 2¹⁴ = 61527847 is a prime.

It is a super-2 number, since 2×61544231² = 7575384738762722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61544231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61544237) 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, 24200 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (8843028).

Almost surely, 2^61544231 is an apocalyptic number.

61544231 is a deficient number, since it is larger than the sum of its proper divisors (9199993).

61544231 is a wasteful number, since it uses less digits than its factorization.

61544231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51001.

The product of its digits is 2880, while the sum is 26.

The square root of 61544231 is about 7845.0131293708. The cubic root of 61544231 is about 394.8169445016.

Adding to 61544231 its reverse (13244516), we get a palindrome (74788747).

The spelling of 61544231 in words is "sixty-one million, five hundred forty-four thousand, two hundred thirty-one".