61520214 has 32 divisors (see below), whose sum is σ = 148020480. Its totient is φ = 16651872.
The previous prime is 61520203. The next prime is 61520219. The reversal of 61520214 is 41202516.
It is a Harshad number since it is a multiple of its sum of digits (21).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (61520219) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37749 + ... + 39344.
It is an arithmetic number, because the mean of its divisors is an integer number (4625640).
Almost surely, 261520214 is an apocalyptic number.
61520214 is an abundant number, since it is smaller than the sum of its proper divisors (86500266).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61520214 is a wasteful number, since it uses less digits than its factorization.
61520214 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 77124.
The product of its (nonzero) digits is 480, while the sum is 21.
The square root of 61520214 is about 7843.4822623628. The cubic root of 61520214 is about 394.7655800757.
The spelling of 61520214 in words is "sixty-one million, five hundred twenty thousand, two hundred fourteen".
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