61075100 has 36 divisors (see below), whose sum is σ = 133455000. Its totient is φ = 24260160.

The previous prime is 61075099. The next prime is 61075103. The reversal of 61075100 is 157016.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61075103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12851 + ... + 16949.

Almost surely, 2^61075100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61075100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66727500).

61075100 is an abundant number, since it is smaller than the sum of its proper divisors (72379900).

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

61075100 is a wasteful number, since it uses less digits than its factorization.

61075100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262 (or 4255 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 61075100 is about 7815.0559818852. The cubic root of 61075100 is about 393.8111990204.

The spelling of 61075100 in words is "sixty-one million, seventy-five thousand, one hundred".