61001215 has 8 divisors (see below), whose sum is σ = 79856208. Its totient is φ = 44364480.

The previous prime is 61001203. The next prime is 61001233. The reversal of 61001215 is 51210016.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61001215 - 2⁵ = 61001183 is a prime.

It is a super-2 number, since 2×61001215² = 7442296462952450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554502 + ... + 554611.

It is an arithmetic number, because the mean of its divisors is an integer number (9982026).

Almost surely, 2^61001215 is an apocalyptic number.

61001215 is a deficient number, since it is larger than the sum of its proper divisors (18854993).

61001215 is a wasteful number, since it uses less digits than its factorization.

61001215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109129.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 61001215 is about 7810.3274579239. The cubic root of 61001215 is about 393.6523318689.

It can be divided in two parts, 61001 and 215, that added together give a palindrome (61216).

The spelling of 61001215 in words is "sixty-one million, one thousand, two hundred fifteen".