61142431 has 16 divisors (see below), whose sum is σ = 72534528. Its totient is φ = 50450400.

The previous prime is 61142429. The next prime is 61142449. The reversal of 61142431 is 13424116.

It is not a de Polignac number, because 61142431 - 2¹ = 61142429 is a prime.

It is a super-2 number, since 2×61142431² = 7476793737179522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61142401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19941 + ... + 22801.

It is an arithmetic number, because the mean of its divisors is an integer number (4533408).

Almost surely, 2^61142431 is an apocalyptic number.

61142431 is a deficient number, since it is larger than the sum of its proper divisors (11392097).

61142431 is a wasteful number, since it uses less digits than its factorization.

61142431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982.

The product of its digits is 576, while the sum is 22.

The square root of 61142431 is about 7819.3625699286. The cubic root of 61142431 is about 393.9558622514.

Adding to 61142431 its reverse (13424116), we get a palindrome (74566547).

It can be divided in two parts, 6 and 1142431, that multiplied together give a palindrome (6854586).

The spelling of 61142431 in words is "sixty-one million, one hundred forty-two thousand, four hundred thirty-one".