61442531 has 2 divisors, whose sum is σ = 61442532. Its totient is φ = 61442530.

The previous prime is 61442519. The next prime is 61442543. The reversal of 61442531 is 13524416.

It is a balanced prime because it is at equal distance from previous prime (61442519) and next prime (61442543).

It is a cyclic number.

It is not a de Polignac number, because 61442531 - 2⁶ = 61442467 is a prime.

It is a super-2 number, since 2×61442531² = 7550369231371922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61442531.

It is not a weakly prime, because it can be changed into another prime (61442581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30721265 + 30721266.

It is an arithmetic number, because the mean of its divisors is an integer number (30721266).

Almost surely, 2^61442531 is an apocalyptic number.

61442531 is a deficient number, since it is larger than the sum of its proper divisors (1).

61442531 is an equidigital number, since it uses as much as digits as its factorization.

61442531 is an evil number, because the sum of its binary digits is even.

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

The square root of 61442531 is about 7838.5286246846. The cubic root of 61442531 is about 394.5993502063.

Adding to 61442531 its reverse (13524416), we get a palindrome (74966947).

The spelling of 61442531 in words is "sixty-one million, four hundred forty-two thousand, five hundred thirty-one".