61311270 has 32 divisors (see below), whose sum is σ = 148925952. Its totient is φ = 16152032.

The previous prime is 61311253. The next prime is 61311281. The reversal of 61311270 is 7211316.

61311270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9822 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (4653936).

Almost surely, 2^61311270 is an apocalyptic number.

61311270 is an abundant number, since it is smaller than the sum of its proper divisors (87614682).

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

61311270 is a wasteful number, since it uses less digits than its factorization.

61311270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24716.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 61311270 is about 7830.1513395336. The cubic root of 61311270 is about 394.3181528432.

Adding to 61311270 its reverse (7211316), we get a palindrome (68522586).

The spelling of 61311270 in words is "sixty-one million, three hundred eleven thousand, two hundred seventy".