61201431 has 12 divisors (see below), whose sum is σ = 88661352. Its totient is φ = 40681296.

The previous prime is 61201423. The next prime is 61201453. The reversal of 61201431 is 13410216.

It is a happy number.

It is not a de Polignac number, because 61201431 - 2³ = 61201423 is a prime.

It is a super-2 number, since 2×61201431² = 7491230312895522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61201031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6676 + ... + 12921.

It is an arithmetic number, because the mean of its divisors is an integer number (7388446).

Almost surely, 2^61201431 is an apocalyptic number.

61201431 is a deficient number, since it is larger than the sum of its proper divisors (27459921).

61201431 is a wasteful number, since it uses less digits than its factorization.

61201431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19950 (or 19947 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61201431 is about 7823.1343462835. The cubic root of 61201431 is about 394.0825387301.

Adding to 61201431 its reverse (13410216), we get a palindrome (74611647).

The spelling of 61201431 in words is "sixty-one million, two hundred one thousand, four hundred thirty-one".