61155030 has 32 divisors (see below), whose sum is σ = 150188544. Its totient is φ = 15928416.

The previous prime is 61155023. The next prime is 61155047. The reversal of 61155030 is 3055116.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61154988 and 61155006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22414 + ... + 24993.

It is an arithmetic number, because the mean of its divisors is an integer number (4693392).

Almost surely, 2^61155030 is an apocalyptic number.

61155030 is an abundant number, since it is smaller than the sum of its proper divisors (89033514).

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

61155030 is a wasteful number, since it uses less digits than its factorization.

61155030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47460.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 61155030 is about 7820.1681567598. The cubic root of 61155030 is about 393.9829198880.

The spelling of 61155030 in words is "sixty-one million, one hundred fifty-five thousand, thirty".