61231401 has 48 divisors (see below), whose sum is σ = 111196800. Its totient is φ = 31541760.

The previous prime is 61231393. The next prime is 61231421. The reversal of 61231401 is 10413216.

It is a happy number.

It is not a de Polignac number, because 61231401 - 2³ = 61231393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61231421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102961 + ... + 103553.

It is an arithmetic number, because the mean of its divisors is an integer number (2316600).

Almost surely, 2^61231401 is an apocalyptic number.

It is an amenable number.

61231401 is a deficient number, since it is larger than the sum of its proper divisors (49965399).

61231401 is a wasteful number, since it uses less digits than its factorization.

61231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 763 counting only the distinct ones).

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

The square root of 61231401 is about 7825.0495845074. The cubic root of 61231401 is about 394.1468549078.

Adding to 61231401 its reverse (10413216), we get a palindrome (71644617).

The spelling of 61231401 in words is "sixty-one million, two hundred thirty-one thousand, four hundred one".