61231398 has 16 divisors (see below), whose sum is σ = 125311296. Its totient is φ = 19935720.

The previous prime is 61231393. The next prime is 61231421. The reversal of 61231398 is 89313216.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231393) 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, 118408 + ... + 118923.

It is an arithmetic number, because the mean of its divisors is an integer number (7831956).

Almost surely, 2^61231398 is an apocalyptic number.

61231398 is an abundant number, since it is smaller than the sum of its proper divisors (64079898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61231398 is a wasteful number, since it uses less digits than its factorization.

61231398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237379.

The product of its digits is 7776, while the sum is 33.

The square root of 61231398 is about 7825.0493928154. The cubic root of 61231398 is about 394.1468484708.

The spelling of 61231398 in words is "sixty-one million, two hundred thirty-one thousand, three hundred ninety-eight".