61213136 has 20 divisors (see below), whose sum is σ = 124843200. Its totient is φ = 28995552.

The previous prime is 61213091. The next prime is 61213151. The reversal of 61213136 is 63131216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100376 + ... + 100983.

It is an arithmetic number, because the mean of its divisors is an integer number (6242160).

Almost surely, 2^61213136 is an apocalyptic number.

It is an amenable number.

61213136 is an abundant number, since it is smaller than the sum of its proper divisors (63630064).

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

61213136 is a wasteful number, since it uses less digits than its factorization.

61213136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201386 (or 201380 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 61213136 is about 7823.8824122043. The cubic root of 61213136 is about 394.1076603762.

The spelling of 61213136 in words is "sixty-one million, two hundred thirteen thousand, one hundred thirty-six".