61430155 has 8 divisors (see below), whose sum is σ = 73796112. Its totient is φ = 49090848.

The previous prime is 61430153. The next prime is 61430183. The reversal of 61430155 is 55103416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61430155 - 2¹ = 61430153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61430153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1177 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (9224514).

Almost surely, 2^61430155 is an apocalyptic number.

61430155 is a deficient number, since it is larger than the sum of its proper divisors (12365957).

61430155 is a wasteful number, since it uses less digits than its factorization.

61430155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13325.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 61430155 is about 7837.7391510563. The cubic root of 61430155 is about 394.5728545015.

The spelling of 61430155 in words is "sixty-one million, four hundred thirty thousand, one hundred fifty-five".