61205154231 has 16 divisors (see below), whose sum is σ = 88300849280. Its totient is φ = 37486199520.

The previous prime is 61205154223. The next prime is 61205154239. The reversal of 61205154231 is 13245150216.

It is an interprime number because it is at equal distance from previous prime (61205154223) and next prime (61205154239).

It is not a de Polignac number, because 61205154231 - 2³ = 61205154223 is a prime.

It is a super-2 number, since 2×61205154231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61205154239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3710641 + ... + 3727098.

It is an arithmetic number, because the mean of its divisors is an integer number (5518803080).

Almost surely, 2^61205154231 is an apocalyptic number.

61205154231 is a deficient number, since it is larger than the sum of its proper divisors (27095695049).

61205154231 is a wasteful number, since it uses less digits than its factorization.

61205154231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437966.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 61205154231 in words is "sixty-one billion, two hundred five million, one hundred fifty-four thousand, two hundred thirty-one".