61123151 has 4 divisors (see below), whose sum is σ = 62276472. Its totient is φ = 59969832.

The previous prime is 61123147. The next prime is 61123163. The reversal of 61123151 is 15132116.

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 61123151 - 2² = 61123147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61123141) 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, 576581 + ... + 576686.

It is an arithmetic number, because the mean of its divisors is an integer number (15569118).

Almost surely, 2^61123151 is an apocalyptic number.

61123151 is a deficient number, since it is larger than the sum of its proper divisors (1153321).

61123151 is a wasteful number, since it uses less digits than its factorization.

61123151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153320.

The product of its digits is 180, while the sum is 20.

The square root of 61123151 is about 7818.1296356609. The cubic root of 61123151 is about 393.9144492894.

Adding to 61123151 its reverse (15132116), we get a palindrome (76255267).

The spelling of 61123151 in words is "sixty-one million, one hundred twenty-three thousand, one hundred fifty-one".