61227771131 has 4 divisors (see below), whose sum is σ = 61420918992. Its totient is φ = 61034623272.

The previous prime is 61227771107. The next prime is 61227771169. The reversal of 61227771131 is 13117772216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61227771131 - 2¹⁴ = 61227754747 is a prime.

It is a super-2 number, since 2×61227771131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61227774131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96573455 + ... + 96574088.

It is an arithmetic number, because the mean of its divisors is an integer number (15355229748).

Almost surely, 2^61227771131 is an apocalyptic number.

61227771131 is a deficient number, since it is larger than the sum of its proper divisors (193147861).

61227771131 is a wasteful number, since it uses less digits than its factorization.

61227771131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193147860.

The product of its digits is 24696, while the sum is 38.

The spelling of 61227771131 in words is "sixty-one billion, two hundred twenty-seven million, seven hundred seventy-one thousand, one hundred thirty-one".