56149851 has 4 divisors (see below), whose sum is σ = 74866472. Its totient is φ = 37433232.

The previous prime is 56149811. The next prime is 56149871. The reversal of 56149851 is 15894165.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56149851 - 2²¹ = 54052699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56149801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9358306 + ... + 9358311.

It is an arithmetic number, because the mean of its divisors is an integer number (18716618).

Almost surely, 2^56149851 is an apocalyptic number.

56149851 is a deficient number, since it is larger than the sum of its proper divisors (18716621).

56149851 is a wasteful number, since it uses less digits than its factorization.

56149851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18716620.

The product of its digits is 43200, while the sum is 39.

The square root of 56149851 is about 7493.3204255523. The cubic root of 56149851 is about 382.9271881529.

The spelling of 56149851 in words is "fifty-six million, one hundred forty-nine thousand, eight hundred fifty-one".