61311150 has 36 divisors (see below), whose sum is σ = 164723832. Its totient is φ = 16349520.

The previous prime is 61311143. The next prime is 61311193. The reversal of 61311150 is 5111316.

61311150 is a `hidden beast` number, since 613 + 1 + 1 + 1 + 50 = 666.

It is a super-2 number, since 2×61311150² = 7518114228645000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67674 + ... + 68573.

It is an arithmetic number, because the mean of its divisors is an integer number (4575662).

Almost surely, 2^61311150 is an apocalyptic number.

61311150 is an abundant number, since it is smaller than the sum of its proper divisors (103412682).

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

61311150 is a wasteful number, since it uses less digits than its factorization.

61311150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136265 (or 136257 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 61311150 is about 7830.1436768427. The cubic root of 61311150 is about 394.3178955865.

Adding to 61311150 its reverse (5111316), we get a palindrome (66422466).

The spelling of 61311150 in words is "sixty-one million, three hundred eleven thousand, one hundred fifty".