61371520 has 192 divisors, whose sum is σ = 181396800. Its totient is φ = 19740672.

The previous prime is 61371503. The next prime is 61371523. The reversal of 61371520 is 2517316.

It is a super-2 number, since 2×61371520² = 7532926934220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61371523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595789 + ... + 595891.

It is an arithmetic number, because the mean of its divisors is an integer number (944775).

Almost surely, 2^61371520 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 61371520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90698400).

61371520 is an abundant number, since it is smaller than the sum of its proper divisors (120025280).

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

61371520 is a wasteful number, since it uses less digits than its factorization.

61371520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61371520 is about 7833.9977023229. The cubic root of 61371520 is about 394.4472747855.

Adding to 61371520 its reverse (2517316), we get a palindrome (63888836).

The spelling of 61371520 in words is "sixty-one million, three hundred seventy-one thousand, five hundred twenty".