61406215 has 8 divisors (see below), whose sum is σ = 79355808. Its totient is φ = 45346080.

The previous prime is 61406209. The next prime is 61406221. The reversal of 61406215 is 51260416.

It is an interprime number because it is at equal distance from previous prime (61406209) and next prime (61406221).

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

It is not a de Polignac number, because 61406215 - 2³ = 61406207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61406215.

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, 472291 + ... + 472420.

It is an arithmetic number, because the mean of its divisors is an integer number (9919476).

Almost surely, 2^61406215 is an apocalyptic number.

61406215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61406215 is a deficient number, since it is larger than the sum of its proper divisors (17949593).

61406215 is a wasteful number, since it uses less digits than its factorization.

61406215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944729.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 61406215 is about 7836.2117761071. The cubic root of 61406215 is about 394.5215913964.

The spelling of 61406215 in words is "sixty-one million, four hundred six thousand, two hundred fifteen".